Hunt Showdown has been updated to version 1.53 today by Crytek. You can get the complete patch notes for this update from here.
According to Crytek, this update is related to a fix for those players who had prestige in their rank after the current Event and then lost access to the Windfield Slate and Caldwell New Army. The download size is thus very small for this hotfix update. Take a look at the statement from Crytek below.
Hunt Showdown Update 1.53 Patch Notes
We will be deploying Update 1.8.0.5 tomorrow, April 28 at PC: 9am CEST, Console: 11am CEST. This update includes a fix for those that prestiged after the Event and lost access to the Winfield Slate and Caldwell New Army. Estimated downtime is ~2 hours.