I have a REALLY basic problem with Prism. I downloaded the free version, saved it on my hard drive and on a Zip disk, but it won't open at all. The icon flashes in the dock very briefly and then goes away. I use a G5 Mac with OS X 10.4.2, and I downloaded the version of Prism for non-Intel Macs. I'm sure there must be a very obvious solution that I haven't thought of, but I need help! Thanks for any you can give me.