Missing compilation

Hi, this is my first post here. I am new to this program.

My music folder contains albums in FLAC and WAV. I am having good results editing my FLAC tags but my complilation WAV albums do not show up in MP3TAG. I see these songs listed as unknown in Windows and on Squeezebox player.

I need to add tags to the unknown album but it is not visible in this program. I have pointed to this directory in MP3TAG. How can I add this type of file to MP3TAG?

Mp3tag cannot tag WAV files.