Hello, @WeMee Store,
First of all, please make sure that you are using the latest version of XStore core and Xstore theme.
You don’t need to purchase bundled plugins. This plugin has some glitches with the auto-updates because of the plugin code. Go to Plugins > deactivate and remove the plugin and then go to XStore > Plugin Installer > install it again. You’ll get the updated version.
If still, the issue persists then please share your site WP Admin URL and Credentials with us via the private content area so that we will check it for you on your site and help you out.
Regards 8Themes Team.