Different versions

Dear David,
It would be nice for many users if it was possible to run different versions of Grasshopper at the same time.
I am translating my old file made in version 5.099 into the latest beta release. This is quit a hazle as the old version does not work in the beta version. (some error with intersections says Scott Davidson).
But I must say that it is good to build the file from zero again. But still..... Cheers, Bas