The "share" link that's supposed to be at the top right is covered by the little university cap that has the "education" popup. Even after clicking through all the education pop ups it's still there.
At the bottom left corner, the only visible button is the "reverse engineer" button. Above it, the "generate SQL" button is clickable, but invisible. Ironically only found out about it being there after an education popup highlighted its existence in the bottom left corner.
These are only minor bugs at least. I'm using Safari 11. Thank you to the SQLDBM team for this tool!
Customer support service by UserEcho