XF 1.3 vBulletin Subscription Import

On Monday I will be converting my site over to XenForo from vBulletin.

But I am confused on one thing.

I have a few hundred paid subscriptions. When they subscribed their usergroup was changed from registered to the paid member user group.

When I convert to XenForo do I change the paid usergroup members to Registered and make their secondary usergroup the paid member usergroup?

Or so I leave them alone so that when their subscription expires they are moved back to the standard registered member usergroup?