Last week Rene Gayer posted how to technically convert a NAV 2009 database to NAV 2013.
Since this is a topic I already worked on, I asked him about a german translation for his post. He decided that his post is interessting for all NAV Developers and wrote it only in english.
For english people: http://www.dynamics-community.at/post/2012/09/06/NAV2013-How-to-convert-a-NAV-2009-Database-to-NAV-2013.aspx
I will post a german version of this how-to in my blog.