Instead of adding yet another option I have optimized the case that a single archive containing a single top-level folder is decrypted/extracted (which, typically, is the result of encrypting a folder). In this case, the single top-level folder extracted from the archive is moved to the user-given output folder instead of the outer temporary folder the archive was extracted to. I think that's what most users anyway expect so that an option is superfluous. In case the extracted folder clashes with an existing folder in the user-given output folder then, as usual, the moved folder gets a numbered suffix to avoid the naming collision.

If the user decrypts multiple archives at the same time or if the decrypted archive contains multiple top-level files or folders then the outer folders named after the decrypted archives are kept when moving the extracted archives to the user-given output folder. Anything else would cause pain and chaos in case of filename collisions between the different archives.