I must be missing something obvious. How do I install a theme that is not a zip file, for example Frozen Stars? When I try to download that one a css file just opens up.
Frozen Stars is not a full theme, it is just custom CSS file that modifies the existing default theme.... you can upload that file in the variant folder ( made for the "Be Social!" variant) and your Elk will change it's styling.
See screenshot..
(http://www.elkarte.net/community/index.php?action=dlattach;topic=1103.0;attach=753)
Thank you.