Thanks MiB, when I only use /xml=. no .xml file is created, but when I use /xml=. /local=. or /xml=c:\ /local=c:\, it both works and the .xml and .ocs files are created within 15 seconds :) So it seems both parameters are required and v18.104.22.168 work too.
I still have a problem with the setup not working anymore (I uninstalled v22.214.171.124 through windows programs uninstaller) and I have to use 7zip to extract the contents, but that would be a different question.