If you can find a 3rd-party utility, it would be a better choice. We have a problem with giving advice on how to crack a password. While we don't doubt your word, it is still possible that you don't actually have rights to the DB in question. If we help you crack someone else's password, we become complicit in an illegal act - misuse of computer software. The problem is simple. You can swear on a stack of actual Bibles that you own the item in question. But if you had sufficient rights to be able to prove it and unlock that DB, you wouldn't need our help in the 1st place.
We have had issues in the past that dealt with people trying to enter a DB of questionable origin. Any accusation that we of the forum staff and expert members participated in breaching a product's security would jeopardize the very existence of this forum because of the recent laws enacted in the UK. Therefore, don't take it as a personal affront if some folks are reluctant to give you more direct advice. We are required by circumstance to tread lightly on this particular topic.