Just for my understanding: I see in the report that the bug is solved in version 1.4. But the newest version I can see is 1.3.1. So you are still working on 1.4?
Re Uppercase: My camera files are .CR2 and .JPG files - so uppercase. But when I write this in the table of xnview then after pressing return it is turned in lowercase.
I tried a bit. When I name the files in .cr2 and .jpg, the filter works, but in this moment I ...