I've just released a new version.
New Features:
- Added support for the Heinrichs Weikamp OSTC cR.
 - Added support for the Oceanic F10/Aeris F10 v3.
 - Much improved support for EON Steel.
 - Various OSTC parsing improvements, primarily for CCR dives.
 - Sites that have no dives now use a different flag on the sites map view.
 - Add option to trim trailing surface samples from Shearwater Petrel dives.
 - Added some new information to XML export (format slightly modified).
 - Available Gases/Tanks are now sorted by name.
 - Added PPO2 column to the raw data table.
 - Improved support for future versions of OS X.
 - Minor performance improvements.
 
- Fixed an issue reading ppo2 from AV1 devices.
 - Fixed an issue reading profiles from an OSTC in case of bailout.
 - Fixed an issue setting gas duration when using OSTC bottom time.
 - Fixed some data issues reading from a VT4.1.
 - Fixed a bug where the profile graph could display incorrectly on deep dives.
 - Fixed incorrect statistics when displaying no dives.
 - Fixed some minor UI bugs.
 - Fixed bug downloading “Last Settings” with no last device available.
 - Fixed issue where some sites may not display correctly after an import.
 - Fixed issue exporting dive sites in some cases.
 - Fixed an issue duplicating dives.
 - Fixed some build issues.
 
Yes, the new stuff is coming. I have some (very awesome) beta testers right now! I will be looking for a broader audience shortly.
Note that this version is no longer compatible with OS X 10.6. This is somewhat accidental and caused by a preemptive fix made for OS X 10.11, but support would have been dropped in short order anyway due to cloud features that require 10.7+.
If you are on 10.6 then for now you should not update, stick with 2.3.7.