Pro Apps Bundle for Students Redemption

Hiya, I bought the Pro Apps Bundle for Students a couple days ago, and I've just downloaded the trial version for LPX. I've used LPX before, but on an old computer that is now broken, so I've had to buy it again. How do I redeem the codes I have received? Is there a function within the LPX app itself I've missed that is meant for redeeming codes/inserting the serial number? I would really like to upgrade to the full version, but I can't seem to figure it out.