Thanks Sean. Yes I purchased the application from Mac App Store, and I use Rightfont to manage my fonts (Cause I am doing some type design work). Is that possible I move my license to the application downloaded from your own store?
Device: MacBook Pro (15-inch, 2017) System: MacOS 10.15.3 (19D76) Designer version: 1.8.2 Can't save any files, just like the image said. Already open the FULL DISK ACCESS for Designer.