How do I upgrade to CandyBar version 3?

CandyBar 3 is available from Panic for $29, there's no Mac App Store version. Discount upgrade pricing is available for registered users of both CandyBar 2 and Pixadex 2. Additionally, users who purchased CandyBar 2 or Pixadex 2 on or after October 1st, 2007 qualify for a free, instant upgrade to CandyBar 3.