does it gives you any error message.
are you using mac or windows
Thanks for the reply.
There are no messages. Using Windows.
As an example, C:\Program Files\Adobe\Adobe Lightroom 5.7.1 is the location for Lightroom 5.7.1. I have pinned it to the task bar. Click on the icon and 5.7.1 executes. If I double click on C:\Program Files\Adobe\Adobe Lightroom 5.7.1\lightroom.exe I can execute LR 5.7.1, just as I would expect.
However, if I try the same with LR 6, which is located in C:\Program Files\Adobe\Adobe Lightroom, nothing happens. It is also pinned to the task bar. Click on the icon on the task bar, or on the desk top, and nothing happens. No message, nothing.
Task Manager indicates the only program running is Firefox, my browser.