Why not put this thing online, real Collab mode? Just have each session with a different uuid in the URL, so that one can share it with other team... Full private mode could be smth one would need to pay for, to fund hosting costs.
(Real lazy to compile the client each time just to do colab work on UMLs)
If the author agrees and provided the other dependants (the two sites this is built upon) don't mind, I can put a little backend for this. Not too difficult.
1. https://github.com/ether/etherpad-lite 2. https://plantuml.com/ -> go to the bottom, there is an editor that renders the diagram, collabuml uses such a public api.
I'm happy to provide details about running etherpad if necessary.
> I can put a little backend for this. Not too difficult.
Etherpad is the collaborative backend, plantuml is the uml renderer (there is a way to run a server with this).