Lightroom CC installed but does not run

Question

The CC update has run and I now have Lightroom CC installed .... or so I thought.
I have a new shortcut for LR but it does nothing.
My old LR 5.7.1 still works - if I open this and check for updates it says it is up to date.
The new LR link is "C:\Program Files\Adobe\Adobe Lightroom\lightroom.exe"
After the LR update, CC said it needed updating so I did the update.
It now says I have the following apps installed ...
Photoshop CC                Update Ready   
Photoshop CC (2014)      Update Ready
Bridge CC                      Update Ready
Lightroom 5                    Up to date
Lightroom CC (2015)       Up to date
Edge Inspect CC            Up to date
I am not aware of any updates for the first 3 items
I presume the multiple copies of versions may be part of the problem.
Any idea how I proceed?

Answer 1

It seems to have worked !   I was doubtful since I had already rebooted so I thought that would resolve things.
After the logout/login, I launched LR and updated my default catalogue. Then notified me that a third-party plugin was no longer compatible (no problem, I dont use it anyway)
Now it is working
Thanks.