RE: SQL license question for 2009 sp1
nav 2015 also works with the sql server express for no cost (but no ms support).
following versions are compatible with nav2015:
* Microsoft SQL Server 2014 Express, Standard or Enterprise.
* Microsoft SQL Server 2012 Express, Standard, or Enterprise (64-bit editions only).
* Microsoft SQL Server 2008 R2 Express, Workgroup, Standard, Data Center, or Enterprise (64-bit editions only).
if you want ms support for the product, you'll need a full version. for that go to:
www.microsoft.com/.../purchasing.aspx