[kimah]

Originally Posted by Mike_73

Check out the following thread on PRS+
https://www.mobileread.com/forums/showthread.php?t=64510

The installation manual as PDF you can find here (you can also contact me via e-mail which is noted within the installation manual). Here you should be able to find something about downgrading the firmware:
http://code.google.com/p/prs-plus/wiki/InstallGuide

All is working fine now!!