White Screen of Death

Anyone else ever see this? A stable full-screen data field breaks in such a way that you are left with just a completely white screen.

I'm removed and reinstalled. I've reset a User Setting. Nothing helps.

Then I went into my Garmin device folders and removed everything I could find related to it. DAT, IDX, STR files. I can't remember what I found.

Anyway, that worked. The data field is fine. I've used and developed CIQ for years and have never seen that, so I thought it was a one-off anomaly. But I just heard someone else mention that.

Is there a known file that gets corrupted that causes that?