Cannot remove agegate..

Hi there Phil,

We installed your plugin to comply with card processor regulations. Then it turned out we did not require it, so tried uninstalling.. tried upgrading and uninstalling yet the plugin is still adding the ‘?v=79cba1185463’ to the end of the domain for all users.. even though the plugin is deactivated or deleted..
Have cleared all caches / cookies / etc etc
How can we properly remove it ?

Thanks

The page I need help with: [log in to see the link]