I tried today again and the installation still doesn't work. The error message window says:
The feature you are trying to use is on a network resource that is unavailable.
Click OK to try again, or enter an alternate path to a folder containing the installation package 'download' in the box below.
Use source:
C:\Users\*****\AppData\Local\Temp\
The biggest annoyance is that I cannot even uninstall the old version for a fresh new installation. Can someone please provide a solution? Thanks!