Of course I never knowingly chose to block GC. I did some more testing, and found that for some reason Bitdefender automatically blocks GC when I launch it for the first time. If I go into the Application Accesses area (of Bitdefender) it says "Blocked" in red w/ GC. But I can change it to "Allowed" and viola (Bratsche) it works.Feature: Anti-Ransomeware
An app you previously chose to block attempted to access your protected files again.
App: /Applications/GraphicConverter 11.app
We blocked the app to prevent it from altering the content of your protected files
Thorsten: I am SO sorry to send you (and me) on a wild goose chase.