If you still have your old computer you can open your Money file on it and then remove the password. Then save your Money.mny file on a flash drive, CD or DVD and copy it over to your new computer. Then just double click on it to open it.
If you don't have that option, then you will need to remember that password to get into your file. Was it similar to other passwords that you have used? Maybe a pet name? Name plus zip code?
etc. Keep a pencil and paper by your bed in case you have an inspiration in the middle of the night.
Bill Becker