Thanks again for the quick reply!
I'll try the first possibility, because I have nothing else (flight plans, etc) on the computer which I use as "slave", so to speak. I only copied the checklist to that computer, not the entire profile, which I'll try as you suggested.
Yes, I was already aware of it, thanks! I always start first on the computer that runs the simulator, where the profiles, flight plans, etc are, and then I start on the secondary computer/tablet.