I just licensed the Lightroom 6 of a trial of creative cloud. To obtain the license, I bought an upgrade. My previous version of Lightroom was 3.6. There was an issue with the serial number - apparently LR6 couldn't see LR3.6. This was resolved with the help of IT (Adobe). I was told it was ok to uninstall LR 3.6 which I did. LR6 worked fine until I started my computer this AM and found that there was no exe file. LR6 files still exist. Not sure how to proceed. Do I need to install LR 3.6 again? Is the exe file buried somewhere in the long list of files? --Thanks for any insights.
The .exe should be here C:\Program Files\Adobe\Adobe Lightroom\lightroom.exe
There is no need to have LR3.6 installed: they are installed in different locations and run independent of one another (although they won't run at the same time).