Hello,
1) Wishlist plugin is not installed https://prnt.sc/wjmjau Go to XStore > Plugin Installer > install YITH Wishlist plugin.
If you want to remove it go to Theme Options > Header builder > edit the connection block and remove the Wishlist element https://prnt.sc/wjmkap You’ll be able to add it again if you decide that you need it.
2) Place connection block into 4 columns instead of 3 https://gyazo.com/87938d06cad6b3993da26f9be26eedf1
3) Revolution slider has advanced responsive options, just follow the documentation https://www.sliderrevolution.com/faq/responsive-content/ or watch video tutorials. We don’t have any other slider elements.
Regards