I had several places pop out on my beaded liner over the winter, Is it safe to take the top rail off while I am reinstalling the bead?

I assume that is the only way to get to it.
I have been taking two sections off at a time. but I am scared that it is going to collapse or something.
And when I put it back together I can't get the original screw holes to line up again. so I know it is moving a little.

I also am gonna use the penny idea I read on another post.