I am asked for a maintenance plan code. What's going on here?

I have purchased FullRecord a few months ago and I have never installed them. I have downloaded the latest and now I am asked for a maintenance plan code. What's going on here?

To install your FullRecord template you need a serial number and a maintenance plan code. These are e-mailed to you upon purchase.

As FullRecord 2.x is a major upgrade it will need a new serial number and maintenance plan, which will be e-mailed to you when you purchase the upgrade.