I have submitted an update to tweak R Instructor based on the comment's I've received. Version 1.02 will include slightly more content, improves system stability, makes a number of bug tweaks... and I've removed ads -- didn't realize how annoying the could be, sorry. Apple is pretty good about releasing updates, hopefully it'll only take a few days.
I am working on a much larger update that expands the content considerably, especially the video section. I'll submit that ASAP.
Keep the comments coming.