I was using a third party file manager rather than Finder. The original installation was not set up properly. I restored the original Calsync files and then reinstalled the update using Finder. All seems to be working properly. I’d still like to sync my planner between my laptop and desktop computers, so a migration feature would be nice to have. Thank you for your quick response.

Jason, right now, it would be more of a convenience to me than a necessity. If I start to travel a lot more, it could become more useful. Here is what I would need - I use Macs at home and for consulting, but my full-time job involves a PC that I do not have admin privileges on. If my calendar lived securely in the cloud so that I could keep my Remarkable in sync wherever I went, I would pay $5 - $7 per month. This would enable me to travel for work without my MacBook and still stay synced. Does that make sense? I did copy the backup folder from my desktop to laptop per a note you had written in this forum, but Calsync didn’t find it on my MacBook. Is there a manual work-around.