The new live messenger installation issue

Hi All,
For some software compatible reason I restore my system to windows live
messenger 8.5 beta stage,which have a windows live messeger 8.5 update 1
update from windows update.
The problem now is I have trouble in installing the new windows live
messenger
version and the patch package can't be opened.
Can anyone tell me where is the windows live messeger 8.5 update 1
stored online and maybe I can reinstalled it...
I know form knowledge base that the problem is the system restore,can
anyone tell me how to solve it and I can successfully installed the new
version software?
Thanks!!!

version 8 aint in beta any more, you can always get the latest version at

http://get.live.com/messenger/overview