LucidWorks 2.0.1 is now available. It's a minor release that fixes a few bugs.
You can download it here: Lucid Imagination Downloads
View the changes here: Changes from LucidWorks v2.0 to 2.0.1
And finally, instructions on how to upgrade from 2.0 are here: Upgrade Instructions for v2.0 to 2.0.1