While the v1.07 patch is free, it launched alongside the third paid DLC, which includes:
Additional objectives in the "Challenges" section that offer exclusive weapons and powerful rewards.
The Scarlet Nexus version 1.07 update, released alongside the "Brain Eater Pack" DLC, is available as a free download for all owners of the game on Steam and other major platforms. Key Features of Version 1.07
A new challenge level where players take double damage and deal significantly less.