We have fixed the bug in new theme version – http://prntscr.com/j0mr5r
Please follow these steps:
– rename xstore theme folder via FTP (on your site will be activated a default theme if you have such one in themes folder);
– rename our theme folder one more time (xstore);
– do update of xstore theme via admin panel to latest version while the default theme is activated on your site;
– activate the xstore theme.
Or provide us with wp-admin and FTP access in the Private Content area.