This is an on going sporadic problem. I tried to import a flac album. The window finished and said no files imported. I tried again and got no files imported but the screen flipped like it does when you import successfully. I checked and they were there but in duplicates. So I deleted the files and tried to re-import. No, the ignore previously deleted files button is not checked. Now it refuses to import the files. I restarted computer and no help. The album is good and not the problem.
This has been sort of an ongoing problem. Many times I import files and it says no files imported but they are there anyway. Sometimes they say no files imported and they aren't. It might take a couple of times and then they finally show up. I actually get no files imported more times than not even when it is a successful import.
If I just click on the files outside the program they will play.