Clearing Old Unprinted Checks from Closed Periods


I am attempting to clean up Sage 50 Premium Accounting on our system.  The Year-End Wizard says we have unprinted Payment Checks and instructs me to print them.  Some of them are errors or rmistakes, and they are in a closed period.  Sage will not let me delete them. void them, or even edit them.  Is there something I can do to clean these off the system?