From LastBit Software:
Access Password recovery tool for MS Access that recovers both database and user's passwords MS Access uses underlying Jet Database Engine. Using AccessPassword you can recover passwords for any Jet database, not only Access' databases. Access password supports users passwords (most of competitive products do not).
Please note that there are two password types in MS Access: user's passwords and database passwords. User's password is always asked along with the user's name (usually when you start MS Access). Database password is asked when you open your password-protected database (user's name is not asked in this case). Please read this article if you need information about these password types.