a recent update in quicken caused beginning balance changes in many of my accounts, all now requiring adjustment entries. What caused this? I hate to backup an older file and update to find it will happen again.
This sometimes occurs when your bank requires you to reauthorize accounts for downloading. A recent change in Quicken was supposed to make recovery easier by entering a separate Balance adjustment transaction that forces your current balance to match the bank's "Online balance" after reauthorizing. See this discussion
Is that what happened in your case?
To work around this issue and simplify recovery, it is a good idea to record the correct opening balance for each account in the Memo field of the Opening Balance transaction. Then if Quicken changes the opening balance, you can change it back to the correct value. If one of the new Balance Adjustment transactions was entered incorrectly, you may need to delete it.
