Hello,
The transfer of Advance Steel databases from a older version to the latest one is done by using the "Merge database" command avaliable in the Management Tools. Here, you are asked to select the source database, which in your case it will be the AS 2010 one. The AS 2011 one is automaticlly considered the one already installed, so the function will not ask you about it.
You can merge any database except one : AstorAddIn.mdb. This database that stores the custom made settings in various areas like Drawing Styles or BoM templates doesn't support merging, and in order to use it with Advance Steel 2011, you'll simply need to copy over the existing one and overwrite it.
Regards,
Dumitru Berteanu