The link below has information on the latest version of the inventory system:
opsive.com
This version changes the Shared.Runtime structure. Before importing ensure you have first removed the Opsive/Shared and Opsive/UltimateInventorySystem folder (remember to backup!).
This update has been released on the Opsive Store and will be on the Asset Store soon.
Ultimate Inventory System 1.2.22 Released - Opsive
Version 1.2.22 of the Ultimate Inventory System is making its way to the Opsive Store and the Asset Store. This version changes the Shared.Runtime structure. . . .
opsive.com
This version changes the Shared.Runtime structure. Before importing ensure you have first removed the Opsive/Shared and Opsive/UltimateInventorySystem folder (remember to backup!).
This update has been released on the Opsive Store and will be on the Asset Store soon.