I have a similar problem. I installed what purported to be a UK version. On opening it insisted on updating and it appears now as a US version. I was assuming the original downloaded file was wrong, but now I think it may have been the update that has caused the problem. My locale is set correctly (as UK) in the registry. I suspect the program is always picking up the US version when it updates.
The UK version has only been out a few days - is anyone else seeing this yet?