crashes playing music (can’t disable visualization)

Running Kodi 17.1 under win10 just fine for some time now, but then I decided to try music visualization.
I had no visualizations, so I went to “My Addons” and enabled the six visualizations I found there. (Milkdrop 1/2, Shadertoy, Spectrum, Vortex, Waveform).
I was seeing some visualizations playing music, although Kodi seemed more sluggish to respond to keys.

I think the real problem might have started when I tried Vortex. Video still works, but if I play an audio file, the file plays to completion and then Kodi crashes. It also crashes if I try to do anything other than change the volume while the audio file is playing. (Windows reports that Kodi is unresponsive.)

So in Settings/Interface/Screensaver I disabled “Use Visualization if playing audio” and under “My Addons” I disabled all the visualizations except Vortex. (That’s because for that particular one, the “Disable” button is grayed out. So I can’t disable Vortex). However the crashes still happen!

Is there any way I can fix this without reinstalling Kodi from scratch?

~Paul