You're right, mdmedicine
- it's my fault, I am really sorry for that
The program may have problems with a specific file. You can do the following to identify the problem file:
Next time the program freezes, close it and restart it.
After that try using "Scan drive for books.." again and remove from the list the books which have already been added (using the button "Remove existing"). In this case the problem-causing file should be the first in the list. And if you do manage to identify the problem file where the program freezes, could you send it to email@example.com
We'll probably be able to figure out how to solve it.
Hope this helps.