I have been trying for weeks to install a trial version of Illustrator CS4 in my computer, but it says this : "Beta or pre-release versions of the following products are installed on this machine, and must be uninstalled before this installation can proceed. Adobe Illustrator CS4 Please uninstall these products, restart your computer and then run this installer again." I've used finder to look for the "installed" program but I absolutely cannot find it. I've installed Clean App as well and no luck, it cant find anything either. Any help or advice would be great!! Thank you! p.s. I use a Powerbook G4 and my OS is up to date .