3.8.2 -cleanup
If invoked with the -cleanup option, rather than running as normal, PuTTY will remove its registry entries and random seed file from the local machine (after confirming with the user). It will also attempt to remove information about recently launched sessions stored in the ‘jump list’ on Windows 7 and up.
Note that on multi-user systems, -cleanup only removes registry entries and files associated with the currently logged-in user.