I upgraded to the new version of Devonthink Not reading it was for Leopard and I am on Tiger (intel). Can I revert back? I have a macbook on leopard but don’t have my Devonthink running on that yet. Can I have the newer version running there simultaneously?
Yes, you can revert. Your existing database was not modified.
See the “Legacy” link on the Download page for a link to the correct version for your operating system.
You also asked whether both DT 1 and DT 2 can be run simultaneously. We don’t recommend that, as Services and scripts will get confused.
But if you need to move between the version 1 and version 2 applications, see http://www.devon-technologies.com/scripts/userforum/viewtopic.php?f=18&t=7117.