i'm still seeing the issue, on every character in my campaign.

At this point with HLO I've just adopted the motto "If it's Blue, it's Bogus".

I used the contextual option that appears for each character in the "Players & PCs" section. Seemed to work as the "campaign option mismatch" flag has disappeared

do you mean the "Use Campaign Options" button, in the "three dots" menu on each character? for me that does not work... or rather, it appears to work for about 3 seconds, then the blue "Options Mismatch" message simply reappears.

Yep that's what I meant. Used it a couple of days ago while building a new PC and the "campaign option mismatch" did not reappear

I just paid for this online license and we're having the same problem. I don't suppose it ever got permanently fixed?