MAGIX VMS 14 Platinum comes with VEGAS DVD Architect, sometimes referred to as DVD Architect 7.0. The current build is update 2 (build 67) . ATM, MAGIX has no separate versions of Studio and Pro.
You cannot change the dark GUI in MVMSP 14. This has been much discussed, e.g. in the threads including these two comments.
The second paragraph here promises "a GUI for everyone" in VPro 15. Hopefully MVMSP will have similar options in the next version upgrade at the latest, i.e. MVMSP 15, possibly due in the next half year or so.