Curious how they set up multiple OS setup files on a single USB stick [I've done it using Grub, but twasn't fun], I ran the app & attempted to set up a USB stick. The app itself is almost portable, so no side effects there, but after creating that USB all my optical drives were gone -- (1) DVD, (1) Blu-ray, & (1) virtual optical drive! I got lucky & win7's troubleshooter was able to get them back, though I had to remove & reinstall the virtual drive software.
In added notes, folks commenting on the download page kept talking about using WinToHDD Pro to clone hard drives -- DON'T. Read their on-line directions & it says you have to set up the partitions on the target drive first. One, why do that extra work, when all these backup &/or cloning apps don't need you to? Two, depending on Windows version etc., you could be talking anywhere from 1 to 4 *special* partitions that can only be created to spec with DiskPart. Yeah, you might make do using a partitioning app, but again, why bother?