All your data and files inside the safe are protected by 256-bit AES encryption: no one can see or listen it (except you, of course). If you decide that your old password is discredited, recode the entire base with a new password.
In June 2003, the U.S. Government announced that AES could be used to protect classified information:
The design and strength of all key lengths of the AES algorithm (i.e., 128, 192 and 256) are sufficient to protect classified information up to the SECRET level. TOP SECRET information will require use of either the 192 or 256 key lengths.