I am afraid that it is not possible because these applications are created in such a way that if you forget the password, the possibility to recover it is practically 0. This is the purpose to protect the data for unauthorized users. During the installation of the Folder Lock, you have set up an additional Master Password. You can use it to unlock the contents of a folder, but remember that this step was optional and in case you have skipped it, the contents of the locked items are lost because recovery is not possible.