If program is started from root folder of a drive, the pre-set folder keeps the trailing backslash

Author: NataljaNeumann

SyncFolders/Forms/SyncFoldersForm.cs

@@ -609,6 +609,7 @@ private void TestIfRunningFromReadonnly()
                 StringComparison.InvariantCultureIgnoreCase);
 
             string strStartupPathWOTrailingSlash =
+                Application.StartupPath.Length>3 &&
                 Application.StartupPath.EndsWith(Path.DirectorySeparatorChar) ?
                    Application.StartupPath.Substring(0, Application.StartupPath.Length - 1) : 
                    Application.StartupPath;