Of course it happens at the worst timing. I have installed LightSwitch RTM last week, preparing for an event at Microsoft. Today, finalizing my preperations, my machine crashed, fixed it self by setting me back a few days.

When I tried to fire up a LightSwitch project - I couldn't. So I tried to re-install LightSwitch RTM - which I couldn't, getting a message that I need to remove LightSwitch Beta 2 (which I already removed about a week ago). I opened up the control panel and I could see that LightSwitch Beta 2 lives on my machine. I was trying to remove it and got an alarming message: "A problem has been encountered while loading the setup components. Canceling setup".

Fortunately for me, I still had the Beta 2 installation. So - I have reinstalled Beta 2, Uninstalled it and reinstalled RTM. It now works!