compatibility PDMWorks Workgroup - Enterprise

When upgrading to Solidworks Classic to Office professional,PDMWorks Workgroup gets available.
This looks quit interesting to me, while we do not have such adocument file managing system.
However, the possibilities of PDMWorks Enterprise also seem greatto me.

Is there a possibility of upgrading Workgroup into Enterprise aftera year or so ?
Thanks for your info.

RonSolidworksSolidworks Pdm enterprise Pdm