No. It’s all about people using user-scripts for the Dashboard - the main interface. You can from a free account as well. 
Just check out:
then
then get to the category of
Make sure you check out all the other ways you change not just the Wanikani experience but also this forum experience as well! 
Edit: for making assumption and not reading the OP well enough. I don’t actually now if there is any difference for you who are on the free accounts as to the lesson picker. There might be a few kinks left to be worked out there. But, perhaps my info can be useful to you as well. ^^