Correcting LUA ART file

[78rpmuser]

My collection of 78s each has its label image stored in the LUA ART folder and for most it works properly. However my earliest songs played by VLC simply showed the Download Cover Art. My own art for those songs is now also stored in the LUA ART file. I have now replayed them several times using the ADD COVER ART FROM FILE option and selecting my own image that is now stored in the LUA ART folder. They continue to show the downloaded image. Why is that? How can I get it to replace the downloaded image with my own image?