Hello,
we don't really provide support for issues caused by mods. Your best bet is probably going to be what you mentioned - not using extended raids. If you still want to try to play the game with extended raid timers and are willing to dig around for causes of the crash, I'd start by looking at the Windows Event Viewer, to see what kind of error gets reported. My wild guess would be the game running out of memory, in which case I'd try turning on the automatic RAM cleaner setting in-game? You'll have to look around on your own for this one.
Thanks for the reply. I've tried with RAM cleaner and adjusting virtual memory. I have 32 GB RAM and it's not close to running out when it's crashing.
I'll look around some more on my own.