Amazon payments set up

I am in the process of setting up CS-Cart with Amazon's UK payments system and was wondering why the only currency I have as an option is dollars and if the line that says “Note: Amazon Checkout integration is currently available for US-based merchants only.” is an outdated reference to AWS only being available in the US or if CS-Cart where not support AWS outside of the US?

I am using V4 MV

I attempted this over a year ago. I had an response from Cs-cart however it was a dead end. Any luck on your side?