Repository file error when using Serena Dimensions 12.2 with SQL Server 2008 SP 3

I was using Serena Dimensions version 10.1.3 for Source Control along with SQL Server  2008 and it was working fine.  Last week we updated Serena Dimensions to version 12.2 and for that I applied Service Pack 3 to my SQL Server 2008. 

I opened Visual Studio 9.0, Tools – Options , and selected ‘Serena Source Control’ for Plug-in Selection.  In that wizard, I get the message ‘You must select a Repository file or folder  before the wizard can proceed’. 

Can anyone help please?  How do I select the Repository?

Thanks.

Rohinton Tarapore