I had 2.76 which I was using an hour before downloading the installer for 18.104.22.168 11/09/2017 It seems to have deleted 2.76, but I still have 2.73 folders but no exe
When clicking the on desktop new icon the missing dll message comes up.
W10, Nvidia Quadro K2000
Don't know if I should find a Open32AL32.dll to download into the blender foundation/blender folder or do something else.
There are two exe - blender.exe and blednderplayer.exe