Disassembly of deep Rationell drawers with railing?

Hello, I want to replace the fronts of my kitchen. With the flat upper ones, that was no problem at all. Do you know how I can get the railing off the lower drawers? It’s the old system where the railing bar is not just clicked in, but screwed on. Thanks for your answers!

Answer is coming late, but maybe others are still interested:
The opposite of installation:
Slide back the plastic cover
Unlock the railing at the back
Fold the railing by 90° (parallel to the plane of the front)
Pull out