Hi Henrik,
many thanks for the advice.
To be honest: I came across the installation page, but didn´t really understand it.
And it took me almost an hour to get the extension installed. A more simple walk-through description might have been helpful for a non-IT person like me.
But now everything is running and I hope I don´t have to fiddle with these things again soon...
Many, many thanks for pointing me in the right direction.
Best regards,
Wolfgang