ᐅ Disassembly of deep pull-out drawers with railing?

Hello,
I want to replace the fronts of my kitchen cabinets. It was no problem with the flat upper ones. Do you know how I can remove the handle rail on the lower drawers? It’s the old system where the rail bar is screwed on rather than just clipped in.

Thanks for your answers!

Answer is coming late, but maybe others are still interested:
Opposite to the installation process:
Slide the plastic casing back
Unlatch the rear railing
Fold the railing 90° (parallel to the plane of the front)
Pull out