You can go here: »/speak ··· /default and click on the different themes to preview them and find the one you were using.
The FAQ related to this (»Site FAQ »Modification of Default Forum Style) really needs to be updated as there is no "theme-override" dropdown menu anymore as shown in the screen shots and the "this page" link in the very first sentence doesn't go anywhere useful.
The FAQ related to this (»Site FAQ »Modification of Default Forum Style) really needs to be updated as there is no "theme-override" dropdown menu anymore as shown in the screen shots and the "this page" link in the very first sentence doesn't go anywhere useful.