See here for a description of what else changed recently and how to continue playing your current campaign with older mods.
Changelog for 1.5.1.7
- Fixed certain enemy armors using incorrect sound effects.
- Fixed crash that could occur when retreating while a bro is swallowed by a Nachzehrer.
- Fixed incorrect armor damage numbers on the ‘Destroy Armor’ and ‘Demolish Armor’ skill tooltips.
- Reverted a change made to the Sunken Library fight that was causing softlocks under some circumstances.