As I think I just typed to ya over at ThreadsDev:
Threads 6.5.1, which is currently in public beta, can import from Invision 1.1, 1.2, and 1.3. We can't import from 2.0 currently.
The import spec file currently isn't published, as I need to do a little more QA on it. If you open up a support ticket, we can send it to you, however.
(It works fine in Threads & Classic - the QA is just for Eve.)
