Dear ivanm,
Now, we have 3 themes (SJ H2shop, SJ Maxshop and SJ Grid) that they are using YT Shortcode 3.x.
Other our themes still old version of YT Shortcode.
Because YT Shortcode 3.x already changed structure of code, it's different with old version. So, when you update this plugin, it will doesn't show icons correctly. If you still want to use it, you need change all old structure code of YT Shortcode in Custom HTML modules and in all your articles manually.
Thanks