installations options for TOOLS for UR-C grayed out

Trying to install Tools for UR-C on a PC with the latest Windows 10 in 64-bit.
I get to the point, where you have to select to install:
Yamaha Steinberg USB Driver
Steinbert UR-C Applications
Basic FX Suite
eLicense Control Center,

but I cannot put ticks in front of the options.
tools for ur-c.png

I probably just solved my problem.
It occured to me, that another person, who set the computer up, had probably installed the software already.
When already installed, the options, that are installed, cannot be selected again, and so they are greyed out.