Currently I have the window propped up with spring clamps that are big enough to not drop any further than the rain guards. Not a great fix, but I have parked it under a bright light with a very visible security camera, emptied the van and opened the glove box, so hopefully that is enough deterrent from anyone trying to pull the window down. I don't have a garage. I love the visibility in this van, by the way.
EDIT: And before anyone chastises me for not seeing this coming, the window worked fine the first couple days. The failure could not have been predicted, unless low power to the system could cause it... It is a piece of plastic that just couldn't hold together anymore. I would also like to replace the driver side, since I can predict it now.