other co-founder here:
1. Currently there isn't support, but not opposed if there is a need. 2. Also, there isn't a way to export (or self host) as of now.
Just some background - We originally built this out as a standalone desktop app (~4 years ago) and then re-worked it for the web around the same time. We were planning to eventually rewrite the desktop app for just that reason - to have the offline syncing and cleaner export UX.