First of all, this is not a complaint. I am a big boy and I knew what could happen when you install a beta. So …
I did install the latest beta of macOS Sierra, 10.12.2 (16C32F). Since then DEVONthink Pro Office crashes every single time I click on a PDF. Whether it is in the inbox, whether in a normal data base. Whether it is an old PDF, whether it is recently synced from DEVONthink To Go.
The Webpage to PDF bookmarklet does work, Print to PDF not (crash again). When I check the data base, no mistake is found. The PDFs are there, just can not get displayed.
I did not found any other program having these problem, including Preview, PDF Expert, Scrivener, DEVONagent. And DEVONthink To Go on the iPad works fine with these PDFs too.
So my guess is that the workaround you introduced with the last version of DEVONthink Pro Office is causing this in combination with whatever Apple changed.
Can you look into this and can you maybe provide me a link to the previous, non-workaround version? I did update from within the program so the latest version I have as a dmg is 2.9. I did not have any PDF troubles with Sierra before.
EDIT: I just sent the crash report, which is too long for a forum post, to feedback@…