WPReNum is a very simple system utility that allows you to change your next order number.
While simple, it is also quite rich in features that make it superior to other modules that provide the same functionality.
Noteworthy extra features:
Sanity check - Prevents changing the order number unless the store is in maintenance mode.
Deletes baskets - All shopping baskets are deleted prior to making the order number change to prevent existing shoppers having an order number assigned that is lower than the new starting number set.
Backs up affected database - The storekeys.dbf module is backed up prior to the module making any changes in case you need to revert back.
Packs Domain Databases - Automatically packs all domain databases to ensure indexes are synchronized correctly after order number change.