This error looks like a protection scheme to me.
No, it doesn't have anything to do with protection, it might simply be you got a corrupted file somehow. Please, stand by, I'll check the file and, if it's really corrupted, I'll re-upload it.
EDIT:
I've just checked the file, downloading it again, and it's fine, installers runs, and is not corrupted. You must have had a transmission problem when you downloaded it. Try deleting the installer, clear your browser cache, then download it again.
Ok, I have downloaded it again just now and this copy works. For some reasons, all my downloads from yesterday on two different
home machines yielded corrupted .exe files.
Thanks.