.... The only known requirement is .NET 3.0, but might run on older versions of .NET.
Version 1.5 adds:
* The ability to trigger cause your firmware (BIOS or UEFI) to start on the next boot
* The ability to have the advanced Windows boot options shown on the next boot.
* Tooltips for all controls
* Timer resets if you click one of the mode buttons that isn't selected.