When you buy a license, we send you a license key by email. It looks something like this:
# BEGIN LICENSE KEY m7u666hTYguuIYqa+M5DxV4kLz1Qm8iE/R3ALj19oDw EfPZN8+H954Q11Co5blkrUUTE+S2zRMZLbVwqY+HK3i 2YVopzUH2I9iy7ITJiscumzDS+2xQ26aq1+38ziafyt co1N/tolyj8IvfbOTfHnM5KcU9+6tgmtWp+ykT0Fr7= # END LICENSE KEY