A year ago I used a special offer to register the domain gexperts.de, which I used only for https://help.gexperts.de. That special offer has now run out and I have decided that it is not worth the money I would now have to pay for it. I will probably add a subdomain under dummzeuch.de as a replacement, but for now you can simply directly use this instead:
https://svn.code.sf.net/p/gexperts/code/trunk/webhelp/index.html