Hi Odri,
in my computer, because I work with more NAV's versions and builds, I solved it creating more reg files, one for each version, and before run the development environment I execute the file of the version that I have to use. The files change the same registry key.
You can find how to create these file in my post:
www.myerrorsandmysolutions.com/the-client-version-does-not-match-the-server-version
I hope useful. It worked for me.
Bye
Eclipses