Hi Novack
Now I got one step further:
1.I had to create my public sheet and copy out the ID
2.Paste the ID and only then I could push the button "Create Table/Worksheet"
3.Then it created a new tab and from this tab I could then read and write.
So it seems to work this way, but had to find out the order of actions myself. Maybe a video would help how to use this stuff the first time. Anyway I will buy it and try to use it.
Zsolt