Aha! I am using version 3.6.2 (the release version), which crashes every time when I try to open my file.
I downloaded the 3.7 preview version, and it appears to fix the crash! I also looked more deeply into the forum, and saw that this topic appears to be related.
That said,I will use the 3.7 preview until it is released, If I don’t see any issues, I will release my macro when 3.7 final is available.
Very happy! Thanks @shryn !
Jim