Okay, I looked over the tile-sets, and it looks like only those snowy bottom and corner tiles were missing. I've added them to the bottom of the winter tile-sets.
Just redownload the file again, everything is still arranged as before. I didn't change the arrangement of the tiles or the width of the file. I just added the missing files to the bottom of the set.
These are the files:
- Lonesome_Forest_WINTER_WALLS_and_CLIFF_EDGES.png
- Lonesome_Forest_WINTER_WALLS_and_CLIFFS_with_FLOOR.png
Let me know if you find any else missing :)