My google-fu has failed me, and I guess this may be basic OS X/Xcode knowledge but....

When I double click .xcodeproj files, I'm getting the Beta I have installed launching instead of the stable release - which is the one I actually want.

I have tried changing the launch program in the finder info window, but it always displays as "Xcode" and doesn't seem to accept that there are different versions - even though it offers them to me in the drop down list.

Is there an xcode setting for this?

Thanks.