Portable as client for Joplin server

So I work quite a while with Joplin on 2 desktops and a mobile.
I signed up for the cloud server and 'have' now access to 'my' part of the server.
Since this is a try out I like to add the portable version side-by-side with one of the desktop versions as client for the server. However clicking on the downloaded porable *.exe opens the existing desktop version. Is this solvable?

Currently Joplin does not allow you to run 2 copies of the app at the same time, portable or not. If you stop one, you can run the other.

Thanks, this works but limits the applicability. Is there a plan to imrove?
Somewhere (on this forum) I did read it as a posible way to group notes for work and private.