You can use your Master Key, which is your registration key in the password text field, and click the OK button to access your files. Master Key is available to registered users only. Enabling this allows people who have forgotten their password to use their registration key in place of a password to unlock their files. This option is checked by default in the registered version. You can uncheck it if you feel it would be even safer. However, you should uncheck it only if you have a very good memory. But for oblivious people like me, it is better to keep it checked, because it is the only way you can get your files back if you forget your password.