You can download the latest version (currently 4.3.8a) from these official community mirrors:
: The latest version of USSEP (4.3.8a) requires your game to be updated to version 1.6.1130 or higher . You can download the latest version (currently 4
: The patch now includes fixes for the four core Creation Club items added to the base game in 2022 (Fishing, Rare Curios, Saints & Seducers, and Survival Mode). These are now hard requirements for the patch to load. Saints & Seducers