File->Repair->RemoveAllBillsData
on a copy of your file.
This Remove All Bills Data feature would be for people who have experienced their Money file to run excessively slow.
To get some information within the program,
File->Repair->RemoveAllBillsData
Read the information. Then click cancel.
Before proceeding, make an extra copy or backup of your file in case you want to undo something.
The problem will be that if you remove all bills, you will probably want to add at least some of your bills back. This can be done manually with the aid of the reports that you print out before removing the bills.
A technique that could help simplify re-entering your bills afterward would be to go your register and selecting a representative instance of your past bill and selecting "Make Recurring" (Ctrl+E). This would be especially helpful if the bill is complex, such as involving a split.