Trouble uninstalling .net framework 4

Hi everyone,
I would like to install Liquid XML Studio which also needs .Net framework version 4 to be installed.
I have just installed it and it seemed to work fine, however it has caused MS Management to malfunction so I am trying to uninstall it and I get the following error message. It keeps talking of compatibility
Blocking Issues:
This setup program requires an x86 computer. It cannot be installed on x64 or IA64 computers.
Is there a way to uninstall this?
I still can’t run liquid XML, it says I am missing .net framework 4! So when I try to install it I am told it is already on the computer! Computers, love them or hate them they are interesting.
Thank you
