Not working anymore

This program was great and worked great. Now it's not working at all.
If I change directory, the files don't show in the program.
If I drag and drop a whole folder into the program, files still don't show.
If I drag and drop a single mp3 file, still nothing.

I also tried upgrading to the latest version. No help.

Maybe you accidently activated a filter-mask that hides all files because they don't match the filter-expression.
If you don't see the filter-field press F3.

Perfect! Thank you.