I'm a member of DaisyDisk Team, so you may refer any questions to me in this topic.
Registration name is case-sensitive, so the best idea might be just copy-pasting it into a registration dialog.
Any owners of 1.x license will be able to upgrade to DaisyDisk 2 with a discounted price.
DaisyDisk 2 is planned to be released in 2010 (lots of work to finish and much more things to test). Before that we plan to release several updates to 1.x
DaisyDisk Team member