Did a bit of Googling to see if there's a reason why a mod wouldn't work. What I'm seeing is that, whenever the game finds two versions of the same script file, it uses the newest one. The files in the mod's RPA should be newer than the ones in the original game... unless you have something newer than the version on the
game page... like a preview version for Patreon patrons or something. Just to be sure, you're using Summertime Saga v0.20.12 Pre-tech - Part 2, downloaded from this site?
Edit:
Just to be sure that I didn't screw something up, I installed a fresh copy of the game and unzipped Beta5 into the game folder. The game started up with the mod. With only two steps, there's really nothing to troubleshoot.
- Install game
- Put mod in SummertimeSaga-0-20-12-pc\game folder
Is anyone else having trouble with Beta5?