It does not matter if I select one file or multiple files. I enter my genre in the left side panel and I get a popup window
Maybe I spoke too soon - but these m4a files were on a network mounted drive. I do not think I’ve ever done that previously - use mp3tag with files on a network mapped drive. Moving to local all is good.
It should also be working on a network drive. What kind of NAS is this?
This is a Synology NAS. I try to never have an application work directly off the NAS unless the files are so large, etc. I only ran into this because I was not aware that I was working off of it. There were about 1700 files on it when I ran it.