Doug sent me 2.2.3 to test it is much better but still not ready I have spoken with him and sent him a bug report. They are hard at work on the issues. The beta 2.2.3 still had the issue with the gear section not retaining the weight data. If they can get that working from what I experienced it will be a highly functional release.
You will still need to go through your dives and set up your cylinders for each dive but the SAC rate data seems to be retained from the old log.
Updates and changes I made to my dive, Location, gear and buddy data seemed to be retained when moving to other records or closing the program.
The changes made to Oceanlog versions later than 2.2.0 will require some editing of your past dive logs to bring them into line with the fields that were added to the software.
this includes the cylinder field, dive site, location, city, state and country. Althought this may be a PITA and time consuming to users with large logs the additions and changes will make for a more precise log. Aside from some of the third party packages that require much more work and customization, Oceanlog may end up being a very complete and functional product.