But I also can't have my computer basically lock up/steal focus every time I want to update my accounts in exchange for mobile sync. I have 20+ years of historical data, I really, really, really don't want to start from scratch.
Prefs > Sync > Off - does prevent the error but also defeats the purpose a bit The second error window actually causes Quicken to beachball and both error windows force focus in front of ALL other windows. The first one happens as the update is ending, and the second happens a few minutes after the sync arrow has stopped. For the last few days, I have not been able to update accounts without getting two generic 'Sync Error' popups ('Quicken encountered an error while communicating with out servers') for every update.