On my 7.5.8 board, the style chooser drop down at the bottom is missing. My Styles CP shows one style as the default: ubbthreads_stock. And that is probably the reason.
However, my styles directory has several CSS files: admin, new_dark, new_light, original_dark, original_stock, and ubb. All have the suffix 1414775161 on them.
In addition there are 2 php files 1.php & wrappers.php.
What am I missing to get more styles? Is there a repository for some free basic styles? The Styles forum on this message board seems to have no recent activity so I'm posting this here.