Disc Player - Version 2.8 | By Sergio Valle not working

I updated to ver 2.8 just today to be sure that wasn’t the problem. I have had this plug for years. I recently went in to make modifications, but I find that it is all frozen. I cannot add new players, new songs, nor move songs.
I REALLY want to make each track downloadable, since that option does not appear anymore.
Here is an example page: https://www.tinnitussynergy.com/tinnitus-frequency-test-page/
Any ideas?