Thanks a lot! The script and the hotkey works well.
I found and use this feature in Filezilla. There you can press a button and all directory changes on the one hand be run simultaneously on the other side. Whether by keyboard or mouse. If you´ll enter a directory that not exist on the other side, filezilla ask you to unlock the button. Thats a very nice feature for directory comparison with your eyes.
Maybe you will set this feature in a future release.
Greatings, Mario