Yep, this worked!

Even with the blank in the path name.
(I did the test after I had done the library maintenance.)
I also tried it then with a larger group of files (the 109 files I had used before) and again: it worked!
(For the 109 files I had to wait a pretty long time with spinning cursor, so that I didn't know if the programme has crashed. Maybe a kind of progress indicator would be helpful?)
When I will have time I will inspect the result and give you feedback. As I told you I have to follow up other obligations and additionally I will be some time without internet connection.