Unable to budget check a closed period voucher

Since upgrading from 8.8 to 9.1, we are no longer able to budget check and liquidate funds for voucher in a closed accounting period. I have found documentation acknowledging this was a design decision made knowing it fully differed from the previous behavior, but I can not find recommendations on how to resolve the issue..on the front end. Allow unposting of paid vouchers, as this would allow the end user to change the accounting period? I would appreciate insight on how others have adapted to the new process design.