Maybe you have a 32 bit operating system?
If you have 64 bit what happens when you click Find Additional Apps?
Lr CC support on Win64bit only ?
Yes LR6 or LRCC 2015 needs Windows 64 bit.
Aha ! Thank you very much
You use mac or window ?
I use both. I have LR CC 2015 on Windows 7 and also on my laptop (Mac Book Pro)