OFFL version 0.1.6 is released and available for download. We've tried to incorporate as many fixes as possible from the help forum, and have tacked on a couple new features as well.
Database performance is slightly improved, but still needs work -- there were enough bugs outstanding that we wanted to get this out soon instead of waiting for that.
Of note, this is the first release to require serious database maintenance. The -patch file has an upgrade script included to handle the conversion. Additionally, the config.php file has been expanded, so you'll need to reset your specifics there before uploading it. Also be sure to check if the items in its new "Troubleshooting" area apply to you. We'll continue to centralize configuration-specific code there.