Just connect to the database in which you are interested, open a new query window, and enter the following query:
[sourcecode language="sql"]
SELECT SERVERPROPERTY('ProductVersion') as 'Product Version',
SERVERPROPERTY('ProductLevel') as 'Product Level',
SERVERPROPERTY('Edition') as 'Edition'
[/sourcecode]
For me, this produced the following:
Product Version Product Level Edition 10.50.1600.1 RTM Enterprise Edition (64-bit)