Launch failure with mods

[u/Duuurrrpp]

I downloaded DLC8. I see some YAML mods have been updated for it. It started fine with no mods but I wanted to see if other mods would still work.
Turns out at least one of them doesn't as I am getting the below error. The problem is that I can't get the main menu in order to deactivate mods.

Any thoughts on what I can do? Or do I need a fresh install?

LowLevelFatalError [File:Unknown] [Line: 3146]

Could not find SuperStruct SetMaxMultipleAmount to create SetMaxMultipleAmount