Hey Eric,
Great question! You can upgrade your license any time by logging into your account here on this site and heading to the My Licenses section — that will display an upgrade link next to your license, which will bump it up to the level you would like.
Check out this post for much more information (including step-by-step instructions) for upgrading a license.
Does this help answer your question? Please let me know and thanks for using the plugins!
Geoff