I am also interested in this move from imported to indexed, and also for collaboration purposes. A few questions, if anyone is still listening:
(1) Does this set of instructions still work? Exporting a database without breaking DevonThink links - #2 by Greg_Jones
(2) If the answer to (1) is yes, am I right in thinking that tags will all be maintained, and internal links will still work?
(3) I sync the database with another Mac, and also with DTTG on an iPad. I presume it’ll mess all that up (but that there are instructions somewhere for fixing it)?