I downloaded the file se_20000005_win64_beta3.msi and tried to install it on my Win 7 x64 system. The installer gets some way into the "Copying new files" phase then it throws an error:
The cabinet file 'Vslick.cab' required for installation is corrupt and cannot be used. This could indicate a network error, an error reading from the CD-ROM, or a problem with this package.
I have re-downloaded the MSI in case the first download was corrupt, and I get an identical file with the same result when trying to install it (the md5sum on the downloaded file is 4bf12486b88116a32d6ced6aa92afdd7).
I'm not installing from CD-ROM or the network, and starting the install asked for the usual UAC elevation. I also tried launching it from an administrator command prompt console.