If you are currently on a monthly meal plans subscription, go to your account page and you will see a link to "Upgrade to VIP." Click on that to easily upgrade anytime.
NOTE: Your membership fee will be prorated, which means if you decide to upgrade half way through the month, your VIP membership fee will apply from the time your monthly membership expires. That way you don't miss out or pay more than what you need to!
If you have previously purchased a menu or program, you can go ahead and join as a VIP member anytime, as you purchased these as a 'one time payment' and don't have an 'active subscription.'