I had the 4.7 installed and had been working fine.
As of lately, Cura popped up a dialog to upgrade to 4.9 and I took the bait ..LOL
Installation went through smoothly, but once the UI is loaded and I try loading an object it crashes by sending multiple instances of dialog box with some errors in it.I clicked Send Report, then the error disappear, along with the UI, as if I had quit Cura.
Here's how I got it to work again -- an older version 4.8
Before you do that, go to