Trial version to paid version porting

we need a built-in feature that ports trail version sprites to paid version sprites, a way to do this is make it so when you buy the paid version you get a code as proof that you bought it and you can use that code to save sprites on the trial version so you can port them to the paid version. or the code just gives you the paid version features for Aseprite. that way you wouldn’t have to copy past every single sprite/frame