Hi,
I bought Affinity Designer in Affinity Store and Affinity Photo in Mac App Store.
I found Affinity Designer' in Users\username\Library\Application Support and also com.seriflabs.affinitydesigner in Users\username\Library\Containers, I renamed both with .old, I tried to start Designer but it does not start. A new Users\username\Library\Application Support\Affinity Designer is created.
I tried to rename Affinity Designer in App Support and reinstall 1.9.3 (I don't have old version) version, with same problem, and same error log on starting app.
Please and attached version .old (but I delete 4 files because of their size, in print screen).
Affinity Designer.old.zip