Support for .wav files?

I noticed that mp3 tag supports .WV files, but I'm having issues dropping in .WAV files for some reason. I thought WV and WAV were interchangeable names, like JPG and JPEG.

Either way, I can't bring them into mp3tag. Bringing in .mp3's are working like they always have. Am I missing something?

WAV is not supported.
.wv extension stands for WavPack audio files.