Hello,
Take our apologies if you faced any inconvenience using our theme!
XStore is a simply customizable theme. Likely it is a cache problem on your site. Do you use cache plugin or CDN? In this case, you need to clear all cache, including cache of browser.
Also, go to Theme Options > Speed optimization > Menu Dropdown Ajax Loading, Menu Dropdown Cache, Menu Cache, Static Blocks Cache, Remove Query Strings From Theme Static Resources > Off. Activate mentioned options once all changes to the header/footer will be done.
We can’t open your site right now. If you mean the green color of an active menu item, here it can be changed – https://prnt.sc/5sRwnlqOZ30S
Regards