• NamelessMC 2.2.5 only. 2.2.5 fixed a security problem in social sign-in, and 2FA is built on that fix. On any other release the installer changes nothing, and StaffCP explains why and asks you to update NamelessMC first. Revert still works on any release.
• All files or none: every file is checked and backed up before any is patched, and if a file cannot be written, the files already changed are put back.
• Native template skins: the Two-factor and recovery codes pages come in DefaultRevamp, Tailwind and Cobalt styling, picked automatically. Other templates use pages that style themselves.
• Restyle it your way: a copy of a page in your template's 2fa folder takes over, and updates never touch it.
• Sign in with a passkey also shows in login pop-ups, such as Cobalt's, with no template edits.
• New StaffCP text in all six languages.

Updating: extract over the old files. Nothing else to do on 2.2.5; your patches stay as they are.