DANGER WILL ROBINSON!!! WORDPRESS TESTING IN PROGRESS!!! THIS WEBSITE WILL SELF DESTRUCT IN 3, 2, 1, BOOOOOOM!!!!!
Some, perhaps all or most, of the Themeforest themes had jquery errors that caused some problems after the wordpress 4.5 update. The solution is exactly what you would expect – you must get an updated version of the theme from its creator at themeforest, and upload and install it as usual with theme forest themes.