"I was using Bosch KTS 540 1Q.2012 and yesterday I have installed version 1Q.2013 - software did a firmware update to newer version. I tested the newest software and there were problems with diagnosis in Renault, Opel cars so I decided to go back. What I did was uninstall the 1Q.2013 soft version and installed 1Q.2012 version again - after connecting KTS 540, software automatically did firmware update (downgrade I would say smile2) to version 1Q.2012. Tested today all worked fine. Hope it was helpfull too."
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