If you want to try something:

1. Make a copy with a new name like “KTHT v5 temporary copy”.

   File | Save a Copy as…

   Click the top button to save an uncompressed copy.

   Note where you save it.

2. Close the actual MoneyWorks file.
3. Open the “KTHT v5 temporary copy”
4. Try out whatever. Then delete that copy so as not to get muddled and apply what you learned in the actual file.