A quick update for future reference and people who also struggle with the Kindle Colorsoft JB and the current version of kindlemodding guide.
1. Start with the mentioned way to install Winterbreak (
https://kindlemodding.org/jailbreaking/WinterBreak/)
2. Install the hotfix - I used 2.3.7 instead of the linked version (
https://github.com/KindleModding/Hot...ses/tag/v2.3.7)
3. Install MRPI from
https://kindlemodding.org/jailbreaki...ing-kual-mrpi/ but
do not use PEKI (there are some problems with the key signatures -
https://github.com/KindleTweaks/PEKI/issues/10).
4. Use the
coplate version from KUAL from
https://www.mobileread.com/forums/sh...d.php?t=225030
Continue with
https://kindlemodding.org/jailbreaki...sable-ota.html and whatever follows.