Does 2014 database structure differ from older versions of GW? Like ver. 8?

Going to migrate from offline files to PST and most conversion tools stops at ver. 8. I have been able to find a couple that lists 2014 as a supported version.

Reg. databases... I am going to pull the files from the server. Two questions:

1) How do I get all needed files? Do I need every files under \\server\post\groupwise (Server is SuSE OES)

2) Which command will stop all processes accessing the database files so that I can copy these with a consistent layout?

Regards, Lars.