I was using Radium on OS X Mojave. When I upgraded to Catalina, it stopped working. Unfortunately, it appears that the developer has stopped working on it.
Is there a way to get this working?
I wrote a patch for Radium to make it work on Catalina (and hopefully later macOSs as well). https://github.com/zvonicek/radium-fix-launcher
I had the same problem, I wouldn't expect a new version since its pretty clear Radium is not being maintained. I'm using OneRadio now, not exactly the same, but still pretty good/similar to Radium imo.