This page has information about the latest version of the character controller:
opsive.com
There is one manual change required when updating so make sure you take a look at the top of the release notes.

Ultimate Character Controller 2.2.5 Released | Opsive
Version 2.2.5 of the Ultimate Character Controller is making its way to the Opsive Store and the Asset Store. If you are coming from a . . .

There is one manual change required when updating so make sure you take a look at the top of the release notes.