I was digging around in some of the minor features and found that export is broken. Export to BrainEKP, that is. When I look in the xml file that's zipped up in the PBA, I see that it has no data to associate Thoughts. But if I leave PB4 on Wander for a while (or explore manually and make sure I cover all Thoughts) and then export it (without closing PB4), there's plenty of data showing how the Thoughts are linked. But if I close PB4 and try an export again, it's back to 'Thoughts'-data only. So I don't think import to BrainEKP is going to be able to work.