The current official version of Tidalis is still 1.000. These later beta versions are previews of content-to-come, and will later be "officially" released via Steam, Impulse, etc, once our vetting process is over with the new changes and features.
Full release notes:
http://arcengames.com/mediawiki/index.php?title=Tidalis_-_1.002_Beta_ReleaseToday was a busy, busy day, but only part of it was on actual Tidalis code this time. The external updaters and "final" version of 1.001 came out this morning, and then this other bug was found in 1.001 and so now this 1.002 version is coming out. Tomorrow should see more progress toward the free DLC release with added content, etc. Stay tuned!