Just an update again (which should be the primary way you get updates and not the downloads).
- Overlays persist through saves
- Replacement textures persist
- Can replace biomeMap.png, waterMap.png, grass/foliage color images (unfortunately can't change pine/birch tree foliage)
- Bomb damage was calculated incorrectly so was dealing 5 times as much damage as intended. Decreased it to max of 20 from the max of 50 it was previously.
- getCurrentItem and getOffhandItem for scripting return back undefined if nothing is held in that hand