Ok, my old computer crashed and I had to reload Acid Pro 4 on a new computer. Well as you would guess it wants me to register it the mp3 licence, well forget that! It tells me the number I am typing right out of the manual. I really do not have the money now to upgrade to the new version and just want to be able to render and load tracks in using mp3's. How would be a way to solve this mystery. Thx!