Hi,
re-reading your post:
I have the unlicensed version 4.2.0.4612 which has the mcMapSurface wizard but I want this wizard in my licensed copy version 4.2.0.3481.
Its not a build that is licensed but the PC. Thus if you download the latest build to a PC that is already licensed then the new and later build works seamlessly.
Additionally, each Mach4Hobby purchase allows up to FIVE fully licensed PC's.....so you could have an earlier build licensed one one PC and another later build
on another PC entirely, and also be licensed.
Licensing should not prevent you from having an up-to-date build.
Craig