I faced a problem with one roller blind in our house about 2 weeks back. In the early morning, I was going to pull up the blind while talking to my son. I actually was pulling the wrong end of the bead chain, and suddenly felt a little resistance. By the time I realized, the beads connector, which is supposed to act as stopper, had somehow passed through the gap between the wheel guard (at the top) and the wheel teeth! Now the up and down segments of the chain have reversed, and the screen is touching the window pane (instead of being away from the pane). I can still operate the blind, but I can’t pull up the screen fully. The beads connector is in wrong position, and stops the screen about 30 cm from the top of the roller.
I wanted to remove the roller from the frame. But the mechanism is not clear to me. I have attached two pictures. Pic-1 shows the drive (chain) end of the roller that has the problem. Pic-2 shows the non-drive end of this roller. In fact, the Pic-2 shows the pictures of 2 separate roller ends. The left one is the other end of the roller noted in Pic-1. It seems from Pic-2 that the roller pin at the non-drive end is pushed into a slot in the metal frame. The right side roller end in Pic-2 is the roller of another blind (which is OK). You can see the screen positions, relative to the window pane, for the two blinds. The right blind, showing the screen away from the window, is the correct position. I may have given too much detail. But, I thought, it is better to give more info than less.
I would much appreciate to receive some guidance about how to remove the roller (Pic-1) from the metal frame.

Regards,
Sayeed Hassan