Hello,
Changes were done in Theme Options > Styling > Custom css. It won’t make an effect on the result of theme updating.
What browser do you use? Here is how it looks in Chrome for me -https://gyazo.com/4bc6bdf7f08b81b6dcb388274ef8515c
Looks like you changed wp-admin access so I can’t log in. Please provide correct access and we will check settings for the button one more time.
Regards