I just replaced the Sweet16 disk image you can download with a new copy that doesn't have the trademark symbol in the disk name. Some folks were copying that over to their Mac as a folder, and the trademark symbol is non-ASCII -- and Sweet16 can't currently handle pathnames with non-ASCII characters in them, so this would break it.

I'll be releasing a minor update in the next few days, I hope. That version probably won't fix the non-ASCII pathname problem yet, but addresses a couple of other minor bugs and has a couple of very minor enhancements. It may also slightly improve performance, although that's not a primary reason for the update.