For version 3.13.1 it is not possible to enlarge the application window in the simulator - see the picture.
I’m using VMware Player 15.5.6 (there was no problem with previous versions incl. 3.12.1).
The application window behaves as inactive and occasionally blinks. You can’t work with it, only in its basic size.
you can make the Resolution fit the Resolution of the VM when you go to the Setting of the VM when it is not running.
So open VM Player, go to the properties of the UR SIM VM and check “use host Settings for Monitors”.