The link below has information on the latest version of the character controller.
opsive.com
This version changes the Shared.Runtime structure. Before importing ensure you have first removed the Opsive/Shared and Opsive/UltimateCharacterController folder (remember to backup!).
The following add-ons were also updated:
opsive.com
opsive.com
opsive.com
opsive.com
These updates have been released on the Opsive Store and will be on the Asset Store soon.

Ultimate Character Controller 3.1.1 Released - Opsive
Version 3.1.1 of the Ultimate Character Controller is making its way to the Opsive Store and the Asset Store. If you are upgrading from version . . .

This version changes the Shared.Runtime structure. Before importing ensure you have first removed the Opsive/Shared and Opsive/UltimateCharacterController folder (remember to backup!).
The following add-ons were also updated:

Agility Pack 2.0.4 Released - Opsive
Version 2.0.4 of the Agility Pack is making its way to the Opsive Store and the Asset Store. This version contains the following changes: Supports . . .


Climbing Pack 2.0.3 Released - Opsive
Version 2.0.3 of the Climbing Pack is making its way to the Opsive Store and the Asset Store. This version contains the following changes: Supports . . .


Swimming Pack 2.0.2 Released - Opsive
Version 2.0.2 of the Swimming Pack is making its way to the Opsive Store and the Asset Store. This version contains the following changes: Supports . . .


PUN Multiplayer Add-On 2.0.8 Released - Opsive
Version 2.0.8 of the PUN Multiplayer Add-On is making its way to the Opsive Store and the Asset Store. This version contains the following changes: . . .

These updates have been released on the Opsive Store and will be on the Asset Store soon.