For some days Designer files (.afdesign) have been trying [and failing] to load in Affinity Photo; since I can go around it just dropping them into Designer's Dock icon, I really didn't care that much, today I also got this:
I mumbled something to myself and try to reset associations but instead they don't set, when I click to change for all files I get a QuickLook thing instead:
I'm selecting Affinity Designer, of course, not QuickLook, I don't even know where that is.
I think it must be a macOS thing since I don't remember having updated Designer recently, in fact I checked updates explicitly for Designer and they weren't any and macOS on the other hand is getting pretty sneaky with automatic crap. I'm going back to High Sierra but I haven't finished setting up a syncing solution to replace iClouds. What could I do to fix associations while I get ready to downgrade?