diff --git a/MCServer/Plugins/APIDump/APIDesc.lua b/MCServer/Plugins/APIDump/APIDesc.lua
index a892adbcd..3ec7dc1d0 100644
--- a/MCServer/Plugins/APIDump/APIDesc.lua
+++ b/MCServer/Plugins/APIDump/APIDesc.lua
@@ -978,7 +978,10 @@ cFile:Delete("/usr/bin/virus.exe");
 				CreateFolder = { Params = "FolderName", Return = "bool", Notes = "(STATIC) Creates a new folder. Returns true if successful." },
 				Delete = { Params = "FileName", Return = "bool", Notes = "(STATIC) Deletes the specified file. Returns true if successful." },
 				Exists = { Params = "FileName", Return = "bool", Notes = "(STATIC) Returns true if the specified file exists." },
+				GetExecutableExt = { Params = "", Return = "string", Notes = "(STATIC) Returns the customary executable extension used by the current platform (\".exe\" on Windows, empty string on Linux). " },
 				GetFolderContents = { Params = "FolderName", Return = "array table of strings", Notes = "(STATIC) Returns the contents of the specified folder, as an array table of strings. Each filesystem object is listed. Use the IsFile() and IsFolder() functions to determine the object type." },
+				GetLastModificationTime = { Params = "Path", Return = "number", Notes = "(STATIC) Returns the last modification time (in current timezone) of the specified file or folder. Returns zero if file not found / not accessible. The returned value is in the same units as values returned by os.time()." },
+				GetPathSeparator = { Params = "", Return = "string", Notes = "(STATIC) Returns the primary path separator used by the current platform. Returns \"\\\" on Windows and \"/\" on Linux. Note that the platform or CRT may support additional path separators, those are not reported." },
 				GetSize = { Params = "FileName", Return = "number", Notes = "(STATIC) Returns the size of the file, or -1 on failure." },
 				IsFile = { Params = "Path", Return = "bool", Notes = "(STATIC) Returns true if the specified path points to an existing file." },
 				IsFolder = { Params = "Path", Return = "bool", Notes = "(STATIC) Returns true if the specified path points to an existing folder." },
diff --git a/MCServer/Plugins/Debuggers/Debuggers.lua b/MCServer/Plugins/Debuggers/Debuggers.lua
index c8e96d378..d255c0f8f 100644
--- a/MCServer/Plugins/Debuggers/Debuggers.lua
+++ b/MCServer/Plugins/Debuggers/Debuggers.lua
@@ -9,7 +9,7 @@ g_ShowFoodStats = false;  -- When true, each player's food stats are sent to the
 
 
 
-function Initialize(Plugin)
+function Initialize(a_Plugin)
 	--[[
 	-- Test multiple hook handlers:
 	cPluginManager.AddHook(cPluginManager.HOOK_TICK,                         OnTick1);
@@ -45,14 +45,12 @@ function Initialize(Plugin)
 	-- Bind all the console commands:
 	RegisterPluginInfoConsoleCommands();
 	
-	Plugin:AddWebTab("Debuggers",  HandleRequest_Debuggers)
-	Plugin:AddWebTab("StressTest", HandleRequest_StressTest)
+	a_Plugin:AddWebTab("Debuggers",  HandleRequest_Debuggers)
+	a_Plugin:AddWebTab("StressTest", HandleRequest_StressTest)
 
 	-- Enable the following line for BlockArea / Generator interface testing:
 	-- PluginManager:AddHook(Plugin, cPluginManager.HOOK_CHUNK_GENERATED);
 	
-	LOG("Initialized " .. Plugin:GetName() .. " v." .. Plugin:GetVersion())
-
 	-- TestBlockAreas()
 	-- TestSQLiteBindings()
 	-- TestExpatBindings()
@@ -63,6 +61,10 @@ function Initialize(Plugin)
 	-- TestUUIDFromName()
 	-- TestRankMgr()
 	TestFileExt()
+	TestFileLastMod()
+	
+	local LastSelfMod = cFile:GetLastModificationTime(a_Plugin:GetLocalFolder() .. "/Debuggers.lua")
+	LOG("Debuggers.lua last modified on " .. os.date("%Y-%m-%dT%H:%M:%S", LastSelfMod))
 
 	--[[
 	-- Test cCompositeChat usage in console-logging:
@@ -92,6 +94,19 @@ end
 
 
 
+function TestFileLastMod()
+	local f = assert(io.open("test.txt", "w"))
+	f:write("test")
+	f:close()
+	local filetime = cFile:GetLastModificationTime("test.txt")
+	local ostime = os.time()
+	LOG("file time: " .. filetime .. ", OS time: " .. ostime .. ", difference: " .. ostime - filetime)
+end
+
+
+
+
+
 function TestPluginCalls()
 	-- In order to test the inter-plugin communication, we're going to call Core's ReturnColorFromChar() function
 	-- It is a rather simple function that doesn't need any tables as its params and returns a value, too
diff --git a/src/OSSupport/File.cpp b/src/OSSupport/File.cpp
index fcd5ec027..fe72f34b4 100644
--- a/src/OSSupport/File.cpp
+++ b/src/OSSupport/File.cpp
@@ -458,9 +458,14 @@ AString cFile::ChangeFileExt(const AString & a_FileName, const AString & a_NewEx
 	auto res = a_FileName;
 
 	// If the path separator is the last character of the string, return the string unmodified (refers to a folder):
-	#ifdef _WIN32
-		auto LastPathSep = res.find_last_of("/\\");  // Find either path separator - Windows accepts slashes as separators, too
+	#if defined(_MSC_VER)
+		// Find either path separator - MSVC CRT accepts slashes as separators, too
+		auto LastPathSep = res.find_last_of("/\\");
+	#elif defined(_WIN32)
+		// Windows with different CRTs support only the backslash separator
+		auto LastPathSep = res.rfind('\\');
 	#else
+		// Linux supports only the slash separator
 		auto LastPathSep = res.rfind('/');
 	#endif
 	if ((LastPathSep != AString::npos) && (LastPathSep + 1 == res.size()))
@@ -468,6 +473,7 @@ AString cFile::ChangeFileExt(const AString & a_FileName, const AString & a_NewEx
 		return res;
 	}
 
+	// Append or replace the extension:
 	auto DotPos = res.rfind('.');
 	if (
 		(DotPos == AString::npos) ||  // No dot found
@@ -491,6 +497,52 @@ AString cFile::ChangeFileExt(const AString & a_FileName, const AString & a_NewEx
 
 
 
+unsigned cFile::GetLastModificationTime(const AString & a_FileName)
+{
+	struct stat st;
+	if (stat(a_FileName.c_str(), &st) < 0)
+	{
+		return 0;
+	}
+	#ifdef _WIN32
+		// Windows returns times in local time already
+		return static_cast<unsigned>(st.st_mtime);
+	#else
+		// Linux returns UTC time, convert to local timezone:
+		return static_cast<unsigned>(mktime(localtime(&st.st_mtime)));
+	#endif
+}
+
+
+
+
+
+AString cFile::GetPathSeparator(void)
+{
+	#ifdef _WIN32
+		return "\\";
+	#else
+		return "/";
+	#endif
+}
+
+
+
+
+
+AString cFile::GetExecutableExt(void)
+{
+	#ifdef _WIN32
+		return ".exe";
+	#else
+		return "";
+	#endif
+}
+
+
+
+
+
 int cFile::Printf(const char * a_Fmt, ...)
 {
 	AString buf;
diff --git a/src/OSSupport/File.h b/src/OSSupport/File.h
index 1cf5c71d7..6ee080480 100644
--- a/src/OSSupport/File.h
+++ b/src/OSSupport/File.h
@@ -131,6 +131,18 @@ public:
 	a_FileName may contain path specification. */
 	static AString ChangeFileExt(const AString & a_FileName, const AString & a_NewExt);
 
+	/** Returns the last modification time (in current timezone) of the specified file.
+	The value returned is in the same units as the value returned by time() function.
+	If the file is not found / accessible, zero is returned. */
+	static unsigned GetLastModificationTime(const AString & a_FileName);
+
+	/** Returns the path separator used by the current platform.
+	Note that the platform / CRT may support additional path separators (such as slashes on Windows), these don't get reported. */
+	static AString GetPathSeparator(void);
+
+	/** Returns the customary executable extension used by the current platform. */
+	static AString GetExecutableExt(void);
+
 	// tolua_end
 	
 	/** Returns the list of all items in the specified folder (files, folders, nix pipes, whatever's there). */