Sometimes an owner will lift the awning window too high (or a wind gust will push it up) and the window will fall out.
TOWB group member Kathleen A Smith shows us how she put it back in place.

Tip! Fix – Acrylic window fell out
I got this window in by myself in under 5 minutes.. even surprised myself!
I realized there’s a notch on the window that you need to line up with a hidden stopper that’s in the window frame channel.
I found the bumper by running my fingernail in the channel. I used Post-its to line them up. VoilĂ !
To get the window into the channel you need to raise the window up at a steep angle, once you feel it in the channel
you need to pull the window out towards you (to create tension) and slowly lower.