Modding

90° North is meant to be highly moddable. Modding is done by changing XML based configuration files located in the Ambient Games folder in your Documents folder. There's a brief  Modding Guide there. Any changes to the XML is used to configure the game for the next  run. Improvements to the Modding Guide are upcoming. If you don't like your changes, just delete the Ambient Games folder in Documents and it will be recreated with the default settings.

If you make any significant changes to the XML you probably will want to delete your save before running. Saves are in "C:\Users\yourusername\AppData\Roaming\Ambient Games\Schema\saves".