My first installation two days ago wasn't stable.
So I had to read the certification matrix to see, what's the problem.
Windows 10 was a little bit to new for my first installation.
So I tried today Windows 8 in a virtual machine. And that's it.
The difference to my first installation is, that the Forms Configuration Manager didn't start.
In Windows 8 the Configuration Manager did start without problems. These steps were shown in the Manager:
1) Instance Configuration
You have to set a Form Builder Instance Path. I created a new directory and wrote it into the path
2) Configuration Progress
3) End of Configuration
After the configuration you can work with the Form Builder
Just use it