upgrade from Cubase 8 LE to Cubase Elements 8 not working

I had a version CuBase 8 LE.
I was proposed to upgrade to CuBase Elements 8. Following Steinberg website, no further step than the installation of the upgrade execution file is necessary to make Cubase Element 8 working.
I did sell the upgrade and set it up. My Cubase 8 LE key was automatically switched to Cubase Elements 8.
HOWEVER, it is still the CuBase 8 LE program that appears when I click the CuBase icon after installation of the upgrade and (I can still not enjoy the additional audio tracks as available on CuBase Elements 8).
What else do I have to do? Why is it not working? please help !!