Beta2: SequentialWorkflowActivity not found

I seem to have fallen at the first hurdle with Beta2.

I uninstalled WWF VS extensions for Beta1.2 and the Beta1.2 of WWF.

I then installed the Beta2 of WinFX and the Beta2 of WWF VS extensions.

If I create a sequential workflow then it says it can't find the SequentialWorkflowActivity type.

This suggests to me that its still picking up the Beta1.2 versions of the runtime.

Can anybody suggest what I should do to clean down and reinstall

Much obliged,

David