In order to install a permanent (not Trial) copy, you need the long License Code. You obviously had this on the first installation. Did you write down. ? Or, I believe it is listed on the back of the installation disk of a paid copy. Or, it was sent via e-mail if a download purchase. If for some reason you do not have the code, you are out of luck. Perhaps a t/c to Adobe can sort this out when you prove that you bought the original.