@bonemap said:
As a workaround, can I edit the Isadora preferences file manually while the Isadora application is closed?
I don't know how to edit the preferences file since it's binary and not plain text, but one workaround is:
Use the steps in this article to install both the newer version of Isadora, and an older version of Isadora that doesn't have this problem.Delete your Isadora Preferences (use the steps under "macOS" and "Windows Option 2" from this article to delete all of them.)Open an older version of Isadora that doesn't have the issue.Change the OSC port in that versionClose the older version of IsadoraOpen the newer version of IsadoraIt will create a new preferences file by copying the older preferences file, in theory taking on the OSC port you set in the old one.NOTE: If you want to change the port again, you need to perform steps 2-7 above again.