I've used the 1.2 version for some time and been happy with it. I tried version 1.3 on a file (using OS X 10.4.11 on a G5) and got a weird error message: "Can't make current application into type <<class imaA>>"
Quick Change 3.0 worked fine for me and it is free.
FileInfo
changes the creator, type & attributes of files and folders
Version: 1.3