You export the repaint from within the game... Load > (...) Menu > Export

Originally posted by PIKATCH:

Hi. looking in the files I found a folder where the game creates paintjobs made in the game.
Is there any way to open them in panit net or gimp?

(\AppData\LocalLow\PeDePe GbR\City Bus Manager\Mods\Repaints\Local)

When you are in the Bus Editor, click on "New" then on export repaint file to .png
This creates a blank template from the Bus you choose.

Those you can edit with GIMP or any image editor you want.
But Doors, Tires, and additional carparts cant be edited or created.
After editing in GIMP or other, you can click in the game at the same bus in editor on "New"
and on import .png
This creates your template to a .repaint file and you can use it ingame or upload the Bus to the Workshop.

But for now its not possible to edit .repaint files or existing workshop repaints, as far i know.
I always save the project files before extract to .png so I can edit it later and upload as a update or new one.