@simon
thank you very much for your effort.
The downgrade worked for me without any hassle and perfect.
Tip when using Windows 10 (Pro):
I had the problem to get apache running (with starHTTP.bat), because port 80 was already in use by another process.
I followed this instruction: "http://www.coder-welten.com/windows-10-unable-to-open-process/"to free port 80.
After this apache started and the command window stayed open.
ellveez