So I copied over CS4 from my old macbook to my new macbook just a straight copy and something went wrong (probably cuz i copied it) and it didn't work. So i trashed it (first mistake) and tried to re-install, however i keep getting this message "The installer database is invalid: please re-install the product from the original media" I downloaded the DMG file from adobe for the trial and figured I'd just put my serial number in on that one, but i get the same error. So i did a search and found some adobe files and i tried deleting them but to no avail. I also deleted the folder /library/application support/adobe and that didn't work either! I've ran the adobe cs4 cleanup utility and it doesn't find anything... Does anyone know how to fix this! It's getting really annoying!