DevonThink on a Network

How can I best use DTPO on a home network?
I have a Mac mini, iMac, and MacBook networked. I want the database to reside on one hard drive and may switch to either a NAS or Mac mini server. I tried bonjour in Safari, but the other connecting computer downloads a new copy of the document. I don’t need or want multiple copies of a document floating around.
If DTPO allowed one license for multiple installations, I think that would work but I can’t find any documentation that will allow it.

You may of course use the software on multiple computers but not concurrently.