Best way for multiple users to access files

[powerwoman18.me.com]

Ive been searching for a way for a workgroup to share a library of plans besides sending them to each other. The user guides suggest that this can be done, are we required to use the online edition? Do we all have to use the same username or is their a quick way to setup a online library of homes for a group of us to work on. Ive tried searching without any luck.

[Puybaret]

I wonder which part of the user's guide suggest that it's possible to simultaneously edit a sh3d file, because such a feature doesn't exist.