Mp3Tag does not show files

I have recently discovered that the program does not find anything when I open folders with music files. I have tried with both .flac and .mp3-files. I have checked in explorer that the files are actually there, but when I open the folder in Mp3Tag, I get an empty folder saying "no items match your search". I haven't used the program for a while. This didn't use to be a problem; I use Windows 7, by the way. Any ideas? I have version 2.46a

The "Change directory" dialog does not show any files, only folders. So you must select a folder and then just press "Select Folder"