If you prevent dump1090 from starting up, and let VRS start, then it will grab 8080 so then hopefully you can put it on another port. Then restart everything. There is probably a more elegant solution though.
This is true, when initially installing the VRS software it will ask what port you would like to use. However in settings you can re adjust the port number to your liking.
Wanted to give a heads up, I fought VRS for several hours while back before I found online that even if you change the port number in the settings it will (high chance) not actually change it. You will have to reinstall the program and assign the new port number during initial setup. I would imagine you can also find a cfg file and change it in there but I just did the reinstall route which was easiest.