If the imbalance happened during the last fiscal year transition and the difference in Retained Earnings is the Net Profit from last year, there is no need to open history and post entries.  Sage Tech Support should be able to walk you through an internal Rebuild.  It will recalculate the totals.  If not then contact me off forum through the email in my profile.

Thanks so much. Support did walk me through an internal rebuild. It didn't work. But I was able to re-open history mode in the process and was able to manually enter the correct retained earnings figure in the chart of accounts (the difference wasn't net profit from last year - I'm really not sure where it came from even after hours of digging). My prior year-end financials still don't balance somehow... but the current year does. For now, I'm happy with that. But thank you again for the message.