Wow, I never realized you could leave the project and return
It already does. In the Actions area of the left sidebar, select "Choose Actions To Run" and check what you want to run.
I thought it was possible, but I had an issue trying to get it 'restarted'. I would reload AeroScenery but 'Start' would be grayed out. I just realized that though the tiles were outlined in orange, I had to re-select them to bring them into focus which enabled 'Start' (face palm). Works great!