Unprotecting one or more protected Profiles, follows much of the same steps as protecting them in the first place. Start by clicking on the "Profile protection..." menu item once more.

In the list of protected Profiles, select the Profile or Profiles you wish to unprotect. Then click the "Unprotect..." button.

This brings up the password dialog window for those Profiles. Enter the correct password and click "OK". If the password checks out, your Profiles are now unprotected.