diff --git a/src/app/main.cpp b/src/app/main.cpp
index 04e592e6..edfb85ca 100644
--- a/src/app/main.cpp
+++ b/src/app/main.cpp
@@ -20,7 +20,6 @@
 #include "utility/commandline/CommandLineParser.h"
 #include "utility/logging/ConsoleLogger.h"
 #include "utility/logging/FileLogger.h"
-#include "utility/logging/LoggerUtility.h"
 #include "utility/logging/logging.h"
 #include "utility/logging/LogManager.h"
 #include "utility/messaging/type/MessageInterruptTasks.h"
@@ -52,7 +51,7 @@ void setupLogging()
 
 	std::shared_ptr<FileLogger> fileLogger = std::make_shared<FileLogger>();
 	fileLogger->setLogDirectory(UserPaths::getLogPath());
-	fileLogger->setFileName(LoggerUtility::generateDatedFileName("log"));
+	fileLogger->setFileName(FileLogger::generateDatedFileName(L"log"));
 	fileLogger->setLogLevel(Logger::LOG_ALL);
 	logManager->addLogger(fileLogger);
 }
diff --git a/src/lib/CMakeLists.txt b/src/lib/CMakeLists.txt
index 51c71015..903c7c09 100644
--- a/src/lib/CMakeLists.txt
+++ b/src/lib/CMakeLists.txt
@@ -370,8 +370,6 @@ add_files(
 	utility/logging/FileLogger.h
 	utility/logging/Logger.cpp
 	utility/logging/Logger.h
-	utility/logging/LoggerUtility.cpp
-	utility/logging/LoggerUtility.h
 	utility/logging/logging.h
 	utility/logging/LogManager.cpp
 	utility/logging/LogManager.h
diff --git a/src/lib/data/indexer/IndexerCommand.cpp b/src/lib/data/indexer/IndexerCommand.cpp
index f19c096c..684c3e7e 100644
--- a/src/lib/data/indexer/IndexerCommand.cpp
+++ b/src/lib/data/indexer/IndexerCommand.cpp
@@ -1,5 +1,7 @@
 #include "data/indexer/IndexerCommand.h"
 
+#include "utility/utilityString.h"
+
 IndexerCommand::IndexerCommand(
 	const FilePath& sourceFilePath, const std::set<FilePath>& indexedPaths, const std::set<FilePath>& excludedPaths
 )
@@ -15,16 +17,16 @@ IndexerCommand::~IndexerCommand()
 
 size_t IndexerCommand::getByteSize(size_t stringSize) const
 {
-	size_t size = m_sourceFilePath.str().size();
+	size_t size = utility::encodeToUtf8(m_sourceFilePath.wstr()).size();
 
 	for (const FilePath& path: m_indexedPaths)
 	{
-		size += stringSize + path.str().size();
+		size += stringSize + utility::encodeToUtf8(path.wstr()).size();
 	}
 
 	for (const FilePath& path : m_excludedPaths)
 	{
-		size += stringSize + path.str().size();
+		size += stringSize + utility::encodeToUtf8(path.wstr()).size();
 	}
 
 	return size;
diff --git a/src/lib/data/storage/PersistentStorage.cpp b/src/lib/data/storage/PersistentStorage.cpp
index 9590243b..8e3326a7 100644
--- a/src/lib/data/storage/PersistentStorage.cpp
+++ b/src/lib/data/storage/PersistentStorage.cpp
@@ -1885,7 +1885,7 @@ TooltipInfo PersistentStorage::getTooltipInfoForSourceLocationIdsAndLocalSymbolI
 			const NameHierarchy nameHierarchy = NameHierarchy::deserialize(node.serializedName);
 			snippet.code = codec.encode(nameHierarchy.getQualifiedName());
 			snippet.locationFile = std::make_shared<SourceLocationFile>(
-				FilePath(nameHierarchy.getDelimiter() == NAME_DELIMITER_JAVA ? "main.java" : "main.cpp"), true, true);
+				FilePath(nameHierarchy.getDelimiter() == NAME_DELIMITER_JAVA ? L"main.java" : L"main.cpp"), true, true);
 
 			snippet.locationFile->addSourceLocation(
 				LOCATION_TOKEN, 0, std::vector<Id>(1, node.id), 1, 1, 1, snippet.code.size());
@@ -2645,7 +2645,7 @@ void PersistentStorage::buildMemberEdgeIdOrderMap()
 				intToLocationType(location.type),
 				location.id,
 				std::vector<Id>(),
-				FilePath(std::to_string(location.fileNodeId)),
+				FilePath(std::to_wstring(location.fileNodeId)),
 				location.startLine,
 				location.startCol,
 				location.endLine,
diff --git a/src/lib/utility/logging/FileLogger.cpp b/src/lib/utility/logging/FileLogger.cpp
index 09a2d2b0..4648408a 100644
--- a/src/lib/utility/logging/FileLogger.cpp
+++ b/src/lib/utility/logging/FileLogger.cpp
@@ -2,14 +2,43 @@
 
 #include <fstream>
 #include <sstream>
+#include <ctime>
 #include <cstdio>
 
 #include "utility/file/FileSystem.h"
 #include "utility/utilityString.h"
 
+std::wstring FileLogger::generateDatedFileName(const std::wstring& prefix, const std::wstring& suffix)
+{
+	time_t time;
+	std::time(&time);
+	tm t = *std::localtime(&time);
+
+	std::wstringstream filename;
+	if (!prefix.empty())
+	{
+		filename << prefix;
+		filename << L"_";
+	}
+	filename << t.tm_year + 1900 << L"-";
+	filename << (t.tm_mon < 9 ? L"0" : L"") << t.tm_mon + 1 << L"-";
+	filename << (t.tm_mday < 10 ? L"0" : L"") << t.tm_mday << L"_";
+	filename << (t.tm_hour < 10 ? L"0" : L"") << t.tm_hour << L"-";
+	filename << (t.tm_min < 10 ? L"0" : L"") << t.tm_min << L"-";
+	filename << (t.tm_sec < 10 ? L"0" : L"") << t.tm_sec;
+
+	if (!suffix.empty())
+	{
+		filename << L"_";
+		filename << suffix;
+	}
+
+	return filename.str();
+}
+
 FileLogger::FileLogger()
 	: Logger("FileLogger")
-	, m_logFileName("log")
+	, m_logFileName(L"log")
 	, m_logDirectory(L"user/log/")
 	, m_maxLogLineCount(0)
 	, m_maxLogFileCount(0)
@@ -31,7 +60,7 @@ FilePath FileLogger::getLogFilePath() const
 void FileLogger::setLogFilePath(const FilePath& filePath)
 {
 	m_currentLogFilePath = filePath;
-	m_logFileName = "";
+	m_logFileName = L"";
 }
 
 void FileLogger::setLogDirectory(const FilePath& filePath)
@@ -40,7 +69,7 @@ void FileLogger::setLogDirectory(const FilePath& filePath)
 	FileSystem::createDirectory(m_logDirectory);
 }
 
-void FileLogger::setFileName(const std::string& fileName)
+void FileLogger::setFileName(const std::wstring& fileName)
 {
 	if (fileName != m_logFileName)
 	{
@@ -78,17 +107,17 @@ void FileLogger::setMaxLogFileCount(unsigned int fileCount)
 
 void FileLogger::updateLogFileName()
 {
-	if (!m_logFileName.size())
+	if (m_logFileName.empty())
 	{
 		return;
 	}
 
 	bool fileChanged = false;
 
-	std::string currentLogFilePath = m_logDirectory.str() + m_logFileName;
+	std::wstring currentLogFilePath = m_logDirectory.wstr() + m_logFileName;
 	if (m_maxLogFileCount > 0)
 	{
-		currentLogFilePath += "_";
+		currentLogFilePath += L"_";
 		if (m_currentLogLineCount >= m_maxLogLineCount)
 		{
 			m_currentLogLineCount = 0;
@@ -100,10 +129,10 @@ void FileLogger::updateLogFileName()
 			}
 			fileChanged = true;
 		}
-		currentLogFilePath += std::to_string(m_currentLogFileCount);
+		currentLogFilePath += std::to_wstring(m_currentLogFileCount);
 
 	}
-	currentLogFilePath += ".txt";
+	currentLogFilePath += L".txt";
 
 	m_currentLogFilePath = FilePath(currentLogFilePath);
 
diff --git a/src/lib/utility/logging/FileLogger.h b/src/lib/utility/logging/FileLogger.h
index 854e26cd..4e2b4789 100644
--- a/src/lib/utility/logging/FileLogger.h
+++ b/src/lib/utility/logging/FileLogger.h
@@ -10,6 +10,8 @@
 class FileLogger: public Logger
 {
 public:
+	static std::wstring generateDatedFileName(const std::wstring& prefix = L"", const std::wstring& suffix = L"");
+
 	FileLogger();
 	virtual ~FileLogger();
 
@@ -17,7 +19,7 @@ public:
 	void setLogFilePath(const FilePath& filePath);
 
 	void setLogDirectory(const FilePath& filePath);
-	void setFileName(const std::string& fileName);
+	void setFileName(const std::wstring& fileName);
 	void setMaxLogLineCount(unsigned int logCount);
 
 	// setting the max log file count to 0 will disable ringlogging
@@ -31,7 +33,7 @@ private:
 	void logMessage(const std::string& type, const LogMessage& message);
 	void updateLogFileName();
 
-	std::string m_logFileName;
+	std::wstring m_logFileName;
 	FilePath m_logDirectory;
 	FilePath m_currentLogFilePath;
 
diff --git a/src/lib/utility/logging/LoggerUtility.cpp b/src/lib/utility/logging/LoggerUtility.cpp
deleted file mode 100644
index 927f582a..00000000
--- a/src/lib/utility/logging/LoggerUtility.cpp
+++ /dev/null
@@ -1,32 +0,0 @@
-#include "LoggerUtility.h"
-
-#include <sstream>
-#include <ctime>
-
-std::string LoggerUtility::generateDatedFileName(const std::string& prefix, const std::string& suffix)
-{
-	time_t time;
-	std::time(&time);
-	tm t = *std::localtime(&time);
-
-	std::stringstream filename;
-	if (prefix.length() > 0)
-	{
-		filename << prefix;
-		filename << "_";
-	}
-	filename << t.tm_year + 1900 << "-";
-	filename << (t.tm_mon < 9 ? "0" : "") << t.tm_mon + 1 << "-";
-	filename << (t.tm_mday < 10 ? "0" : "") << t.tm_mday << "_";
-	filename << (t.tm_hour < 10 ? "0" : "") << t.tm_hour << "-";
-	filename << (t.tm_min < 10 ? "0" : "") << t.tm_min << "-";
-	filename << (t.tm_sec < 10 ? "0" : "") << t.tm_sec;
-
-	if (suffix.length() > 0)
-	{
-		filename << "_";
-		filename << suffix;
-	}
-
-	return filename.str();
-}
diff --git a/src/lib/utility/logging/LoggerUtility.h b/src/lib/utility/logging/LoggerUtility.h
deleted file mode 100644
index ca90b80c..00000000
--- a/src/lib/utility/logging/LoggerUtility.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#ifndef LOGGER_UTILITY_H
-#define LOGGER_UTILITY_H
-
-#include <string>
-
-class LoggerUtility
-{
-public:
-	static std::string generateDatedFileName(const std::string& prefix = "", const std::string& suffix = "");
-};
-
-#endif // LOGGER_UTILITY_H
\ No newline at end of file
diff --git a/src/lib_cxx/data/indexer/IndexerCommandCxx.cpp b/src/lib_cxx/data/indexer/IndexerCommandCxx.cpp
index e95ffa68..41c224e8 100644
--- a/src/lib_cxx/data/indexer/IndexerCommandCxx.cpp
+++ b/src/lib_cxx/data/indexer/IndexerCommandCxx.cpp
@@ -1,5 +1,7 @@
 #include "data/indexer/IndexerCommandCxx.h"
 
+#include "utility/utilityString.h"
+
 IndexerCommandCxx::IndexerCommandCxx(
 	const FilePath& sourceFilePath,
 	const std::set<FilePath>& indexedPaths,
@@ -23,12 +25,12 @@ size_t IndexerCommandCxx::getByteSize(size_t stringSize) const
 
 	for (auto& i : m_systemHeaderSearchPaths)
 	{
-		size += stringSize + i.str().size();
+		size += stringSize + utility::encodeToUtf8(i.wstr()).size();
 	}
 
 	for (auto& i : m_frameworkSearchPaths)
 	{
-		size += stringSize + i.str().size();
+		size += stringSize + utility::encodeToUtf8(i.wstr()).size();
 	}
 
 	for (auto& i : m_compilerFlags)
diff --git a/src/lib_gui/qt/element/QtLocationPicker.cpp b/src/lib_gui/qt/element/QtLocationPicker.cpp
index 59ec05fb..fc561f36 100644
--- a/src/lib_gui/qt/element/QtLocationPicker.cpp
+++ b/src/lib_gui/qt/element/QtLocationPicker.cpp
@@ -120,9 +120,9 @@ void QtLocationPicker::handleButtonPress()
 	{
 		if (!m_relativeRootDirectory.empty())
 		{
-			const FilePath path(fileName.toStdString());
+			const FilePath path(fileName.toStdWString());
 			const FilePath relPath = path.getRelativeTo(m_relativeRootDirectory);
-			if (relPath.str().size() < path.str().size())
+			if (relPath.wstr().size() < path.wstr().size())
 			{
 				fileName = QString::fromStdWString(relPath.wstr());
 			}
diff --git a/src/lib_gui/qt/element/QtStatusBar.cpp b/src/lib_gui/qt/element/QtStatusBar.cpp
index ad4afeb4..146e3cae 100644
--- a/src/lib_gui/qt/element/QtStatusBar.cpp
+++ b/src/lib_gui/qt/element/QtStatusBar.cpp
@@ -13,7 +13,7 @@ QtStatusBar::QtStatusBar()
 {
 	addWidget(new QWidget()); // add some space
 
-	m_movie = std::make_shared<QMovie>((ResourcePaths::getGuiPath().str() + "statusbar_view/loader.gif").c_str());
+	m_movie = std::make_shared<QMovie>(QString::fromStdWString(ResourcePaths::getGuiPath().concatenate(L"statusbar_view/loader.gif").wstr()));
 	// if movie doesn't loop forever, force it to.
 	if (m_movie->loopCount() != -1)
 	{
diff --git a/src/lib_gui/qt/window/project_wizzard/QtProjectWizzardContentPaths.cpp b/src/lib_gui/qt/window/project_wizzard/QtProjectWizzardContentPaths.cpp
index 323de651..89fb3b66 100644
--- a/src/lib_gui/qt/window/project_wizzard/QtProjectWizzardContentPaths.cpp
+++ b/src/lib_gui/qt/window/project_wizzard/QtProjectWizzardContentPaths.cpp
@@ -697,7 +697,7 @@ void QtProjectWizzardContentPathsHeaderSearch::showDetectedIncludesResult(const
 			if (!relativeRoot.empty())
 			{
 				const FilePath relPath = path.getRelativeTo(relativeRoot);
-				if (relPath.str().size() < path.str().size())
+				if (relPath.wstr().size() < path.wstr().size())
 				{
 					detailedText += relPath.wstr() + L"\n";
 				}
diff --git a/src/lib_java/data/indexer/IndexerCommandJava.cpp b/src/lib_java/data/indexer/IndexerCommandJava.cpp
index 6f6940b9..d4ef8309 100644
--- a/src/lib_java/data/indexer/IndexerCommandJava.cpp
+++ b/src/lib_java/data/indexer/IndexerCommandJava.cpp
@@ -1,5 +1,7 @@
 #include "data/indexer/IndexerCommandJava.h"
 
+#include "utility/utilityString.h"
+
 IndexerCommandType IndexerCommandJava::getStaticIndexerCommandType()
 {
 	return INDEXER_COMMAND_JAVA;
@@ -33,7 +35,7 @@ size_t IndexerCommandJava::getByteSize(size_t stringSize) const
 
 	for (auto& i : m_classPath)
 	{
-		size += stringSize + i.str().size();
+		size += stringSize + utility::encodeToUtf8(i.wstr()).size();
 	}
 
 	return size;
diff --git a/src/test/CommandlineTestSuite.h b/src/test/CommandlineTestSuite.h
index fcd90135..aa838cb2 100644
--- a/src/test/CommandlineTestSuite.h
+++ b/src/test/CommandlineTestSuite.h
@@ -84,7 +84,7 @@ public:
 		std::cout.rdbuf( oldBuf );
 
 		FilePath path = ApplicationSettings::getInstance()->getMavenPath();
-		TS_ASSERT_EQUALS( path.str(), "/opt/testpath/mvn")
+		TS_ASSERT_EQUALS( path.wstr(), L"/opt/testpath/mvn")
 
 	}
 
@@ -102,10 +102,10 @@ public:
 		parser.parse();
 
 		std::vector<FilePath> paths = ApplicationSettings::getInstance()->getHeaderSearchPaths();
-		TS_ASSERT_EQUALS( paths[0].str(), "/usr")
-		TS_ASSERT_EQUALS( paths[1].str(), "/usr/include")
-		TS_ASSERT_EQUALS( paths[2].str(), "/include")
-		TS_ASSERT_EQUALS( paths[3].str(), "/opt/include")
+		TS_ASSERT_EQUALS( paths[0].wstr(), L"/usr")
+		TS_ASSERT_EQUALS( paths[1].wstr(), L"/usr/include")
+		TS_ASSERT_EQUALS( paths[2].wstr(), L"/include")
+		TS_ASSERT_EQUALS( paths[3].wstr(), L"/opt/include")
 
 	}
 
diff --git a/src/test/FileSystemTestSuite.h b/src/test/FileSystemTestSuite.h
index b624a1be..65432318 100644
--- a/src/test/FileSystemTestSuite.h
+++ b/src/test/FileSystemTestSuite.h
@@ -28,7 +28,7 @@ public:
 	void test_find_h_files()
 	{
 		std::vector<std::wstring> headerFiles = utility::convert<FilePath, std::wstring>(
-			FileSystem::getFilePathsFromDirectory(FilePath("data/FileSystemTestSuite"), { L".h" }),
+			FileSystem::getFilePathsFromDirectory(FilePath(L"data/FileSystemTestSuite"), { L".h" }),
 			[](const FilePath& filePath){ return filePath.wstr(); }
 		);