Is it ok to keep the roof open

[Jasper7821]

New owner here
It said somewhere in the manual that you shouldn't keep the roof open.
The passenger window doesn't drop when pulling the handle and read about the cable slack fix and also regulator replacement. Will try that when I have the time.

In the meantime, is it ok to leave the roof open. The roof is original and in fairly decent condition. The window could use replacing as it's yellowed a little and has a few small cracks.

I drive the car a few days a week running errands, and cruise around a little on weekends. It's not cold so I'm not worried about the window getting stiff and it's hot enough that I think the fabric would stay pliable.

Just looking for advice if it's no a big deal, or should the roof stay closed when not driving the car.