As always, the easiest way to find the right updater for you is to let JMP find it (Preferences --> JMP Updates group).
Unfortunately, the technical problem in the earlier maintenance update has delayed the release of full installers for JMP 11.1.1. If you're an administrator, you can request the full installers for this version after March 11. Don't worry, we'll also be sending an email directly to administrators when it's available.
P.S. If you are a longtime JMP user (or even a reader of my earlier post), you will find it ironic that we attempted to go to a two-digit numbering system -- only to have to return to using three digits for this update-to-an-update. Oh, well. The best-laid plans...we'll try again the next time the maintenance train leaves the station.