(2020-07-09, 15:14)N. W. Perry Wrote: I wonder if it could have to do with the existing 4.3 installation, the two versions trying to read the same prefs file or something?
LDView uses the standard macOS preferences mechanism to store its preferences. Ultimately these settings go to com.cobbsville.LDView* files in ~/Library/Preferences, and are in fact shared between different versions. However, this particular preference goes into its own separate file, and that file isn't used by LDView 4.3.