Are you on a Mac or PC? If on a Mac, you can look in Applications > Adobe Flash Builder Beta (or whatever your version is) > Uninstall Adobe Flash Builder Beta. Run the Uninstall from there. If you're on a PC just go to the Control Panel and uninstall using the Add/Remove Programs dialog.
Also, Flash Builder Beta 2 will install in a separate directory than Flash Builder Beta 1, but I think they still recommend that you uninstall Beta 1 first.
Thanks, I see the icon!!
Thanks, I see the uninstall icon!!