Since Microsoft has been rolling out the new Windows 1903 update, many players have reported significant drops in game performance while playing Subsistence (even on high-end hardware).
This patch should fix the performance issues for those affected (not all hardware configurations have experienced the issue). Microsoft may patch the issue, but I didn't want to wait.
This is essentially a patched version of Alpha 49. It does include a few small tweaks of the upcoming Alpha 50 release, but the main features of A50 are still a work-in-progress (and thus are disabled in this build).
I'm working hard on the new update, so please stay tuned for the release.
Cheers,
CG
* Thanks to modder PredatH0r for help with this fix.