KODI-17, Install

I loaded Kodi but my initial Kodi-screen did not show ‘System’ or ‘File Manager’ etc, as shown in videos instead it showed the ‘Welcome to Kodi Setup’ screen.
I went through the setup procedure, leaving ‘Choose Components’ unaltered and clicked on ‘Next’ there. After the ‘Install’ at the end, I clicked on ‘Run Kodi’ and ‘Finish’.
The next screen showed ‘Your Library is currently empty’ etc. On the left side showed a list of subjects from ‘Movies’ down to ‘Weather’.
I could not get out of Kodi, I had to go the task manager to end program.
When I click on the Kodi icon at my taskbar it showed me the ‘Welcome to Kodi Setup’ screen again.

I would be very thankful if someone can help me to get Kodi to work. My email is @Karellen- personal email removed. Thanks for your helful response, Gunter