Excellent portable program In the English display, under the FILE menu the "New" and "Cloning" line is shown as having its hotkey as "STRG N". On viewing the German display I recognised "STRG" as the English "CTRL".
I had previously mentioned refresh error in tree To which you already responded. I also notice that when a directory is deleted and then you hit the back button to return to that deleted directory you get an error message. The behavior in Explorer is much friendlier. It will return you to the adjacent existing directory. Most times you know you deleted the directory and just want to get back to that part of the directory tree (the reason for hitting back).