Don't Starve mod to switch between main screen DLC theme.
Official repo (issues and contrib): https://github.com/autra/ds-dlc-theme-switcher
The following is a maintenance doc, mostly for myself because I keep forgetting how to do all of this ;-)
See this post.
For a typical steam installation, you must copy this folder to ~/.steam/steam/steamapps/common/dont_starve/mods.
Use "Don't starve mod tools", but make a folder without the .git.