This update (.578b) is just a minor patch to attempt to fix various errors that have collected overtime. You'll find the results of attempting to patch up:
-Some various tiling and wall issues
-Errors where the Nightgale woods would block up
-An major bug with the Purity System where your points would become your permanent currency
-The Quest System
-A noted bug with the Zombie school that didn't allow you to beat it or proceed
-And many more smaller adjustments.
If anything else still crops up, do tell me of course! I'll continue working on these along the way as I go.