One more thing:
If you somehow manage to screw up your theme to the point where the whole pub won't load correctly, including the forms necessary to (re)set said theme (yes, you've guessed it: I am speaking from experience:), here's an easy way back:
Of course you'll need a valid session token in "~/.config/.midnight", if you don't have that, just login via curl and store the cookie:
To use that cookie the way it was intended by m15o you'll have to strip it down so the file "~/.config/.midnight" only contains the token/base64 string or modify the curl command, to reset the theme:
More information on this topic can be found here: