S2 pro forum forward to thank you page after payment

I have s2 setup for people to pay, create their account for lifetime membership.
As it stands, the customer stays on the membership page, as they buy.
https://www.tradingcourse.net/joinus
I want to be able to forward the new subscriber to a thank you page so that I can integrate google analytics goals.

I have tried the shortcodes mentioned in an s2 article on forwarding, it worked on some browsers, but not on Internet Explorer/Edge.

Anyone had any success doing something similar thjat works across all browsers?