Cannot create new project or open Resolve - crashfest

Hello.
I was using Resolve this evening, it was behaving very badly, freezing during renders... but eventually got the tiny job done.
I then closed it and then reopened to create a new test project, and I have tried that a few times, rebooted, tried again, and it looks like it's doing something for a few seconds then POOF! gone. No crash popup or anything.
I then tried to reinstall it, but the latest available download from the support site is apparently OLDER than the version I already have installed! So I cannot do that without uninstalling first... VERY WEIRDLY I can open the project I had been working on, but NOT create a new project!!!??
EDIT: I also found that I COULD create a new project if I started the existing project and then created a new one, but NOT from the opening splash screen... seems to be a bug there!
Is there a way to clean this up a bit without deleting the mystery locations where resolve hides project files? I've already had this happen BTW from 19 to 20 upgrade.
tx
Mark.
I was using Resolve this evening, it was behaving very badly, freezing during renders... but eventually got the tiny job done.
I then closed it and then reopened to create a new test project, and I have tried that a few times, rebooted, tried again, and it looks like it's doing something for a few seconds then POOF! gone. No crash popup or anything.
I then tried to reinstall it, but the latest available download from the support site is apparently OLDER than the version I already have installed! So I cannot do that without uninstalling first... VERY WEIRDLY I can open the project I had been working on, but NOT create a new project!!!??
EDIT: I also found that I COULD create a new project if I started the existing project and then created a new one, but NOT from the opening splash screen... seems to be a bug there!
Is there a way to clean this up a bit without deleting the mystery locations where resolve hides project files? I've already had this happen BTW from 19 to 20 upgrade.
tx
Mark.