Is there a way to force multiple LayOut instances

One of the most arbitrary and weird (bad weird) limitations of LayOut is that we cannot have multiple instances of it open. This makes it much harder to test what version a bug was introduced in or check what the heck a bad translation is in the original language. Also in every day work this means we have to click twice to get to a certain LayOut document, first the application in the system tray and then the tab within the application.

Is there a way to start multiple instances, e.g. by providing a custom argument in the launch command?