If we have a PowerInroads SS4 workspace, can we use it directly for PowerInroads SS10?

We have a good PowerInroads SS4 workspace provided by our local agency.  Also we have different departements in my company that mainly use PowerInroads SS2 and are looking to upgrade to PowerInroads SS10 for ongoing projects so they can keep most of their files. 

My question:  Can we use our PowerInroads SS4 workspace for PowerInroads SS10?  If not what works will there be to do?

Thanks