How to extract .urb files

I need to recover a URP program from an old robot (which is not longer available), and the only thing left is a backup in .urb format.
It is not possible to restore a .urb backup in another robot (because the serial numbers don’t match), so I need to extract the file, navigate to the /programs/ folder and get my old URP program back from the file explorer.
Issue is, I cannot find a way to extract the .urb file. It can extract the mounting files, but I cannot access the .img files because apparently they are corrupt.

Has anybody any idea how to open them? Any experience with .urb files?

Once you extract the file(s) from the URB (compressed file) you should be able to open it with any text editor. It’s just a script file with a different (or no) extension.