I'm trying out Trello and am trying to use the Card Repeater power up. I enabled it, and, per the "Trello Card Repeater: How To Stick Regular Tasks on Repeat" article, I should be able to select a card and see a "Power-Ups" section with "Repeater" as an option. I do not have either. Have I missed a step, or is this not available in the free version of Trello?