I just can't take it anymore.
After years of happy torrenting with uTorrent, I foolishly wanted to see the background image of the Catalina Island changing in light conditions corresponding to time of the day. Instead of just getting the picture, I foolishly upgraded to OS Catalina, where Apple finally came to the 64bit world.
You did the right thing to keep your OS updated so your computer will be as secure as possible.
I appeal to anyone here to throw some morsel of guidance how to make Vuze churn out more porn and share it incessantly.
Can't help you with Vuze, but Transmission works great on Mac OS.