Changes:

• Support for atmosphere 0.19
  • Atmosphere now ships without a contents folder and that causes the previous versions to enable compatibility mode and create a titles folder in the /atmosphere directory. If you used previous releases of the theme installer you can safely delete that folder.
  • Support for the titles folder when running atmosphere has been dropped. If you happen to use ancient atmosphere versions (<= 0.10.0) please upgrade your cfw.
• Various fixes in json handling in the theme injector

About the home menu it wasn't update with firmware 12.0, you current themes and existing patches should work fine.