Kenward - On Windows 7, by default, the X1prosetup.exe file should be in your Downloads directory. Running that setup.exe should determine if you're already using the latest build and if it finds you are not on the latest build it will pull it down and install that for you.
That said, if you need/want to redownload you can do so here: http://theflash.x1.com/downloads/pro/x1prosetup.exe.
That said, if you need/want to redownload you can do so here: http://theflash.x1.com/downloads/pro/x1prosetup.exe.