I did try it with fresh install of WordPress and also with updated install, both having debug enabled. Also reactivated the plugin multiple times, but the result remained the same – plugin settings page producing notice about undefined variables (Notice: Undefined variable: options_fontselect in /Library/WebServer/Documents/wp/wp-content/plugins/ultimate-tinymce/options_callback_functions.php on line 33).
@jan Dembowski I’m not saying anything about the support from plugin author, I’m not in the position to judge that. Not everybody runs WP with debug and PHP notices turned off, so these things are immediately visible, same with the plugin mentioned in your linked comment.
Cheers!