Please run icomancer as administrator and/or whitelist it in your antivirus.

If the problem persists, please reply and paste the path of the folder you want to change.

System.NotSupportedException: The given path's format is not supported.
at System.Security.Permissions.FileIOPermission.EmulateFileIOPermissionChecks(String fullPath)
at System.Security.Permissions.FileIOPermission.QuickDemand(FileIOPermissionAccess access, String fullPath, Boolean checkForDuplicates, Boolean needFullPath)
at System.IO.FileInfo.Init(String fileName, Boolean checkHost)
at System.IO.FileInfo..ctor(String fileName)
at Icomancer.Functions.ExtractIconToFile(String SourceIconPath) in H:\Icomancer\Icomancer\Functions.vb:line 1392
at Icomancer.frmContentManager.LocaliconsSelector_PathChanged(String changedPathName, String changedFullPath) in H:\Icomancer\Icomancer\frmContentManager.vb:line 499
at Icomancer.frmContentManager.treeIcons_AfterSelect(Object sender, TreeViewEventArgs e) in H:\Icomancer\Icomancer\frmContentManager.vb:line 468
at System.Windows.Forms.TreeView.OnAfterSelect(TreeViewEventArgs e)
at System.Windows.Forms.TreeView.TvnSelected(NMTREEVIEW* nmtv)
at System.Windows.Forms.TreeView.WmNotify(Message& m)
at System.Windows.Forms.TreeView.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Please take a screen shot of this and send it to icomancer_support@lavasoftworks.com so we can figure out how to fix it.