Can't import rules in new rules UI?

[pyrodex]

I am trying to follow the migration steps but not sure if its a browser issue or UI issue but I can't import the exported rules into the new interface. The import dialog shows no button to press import after selecting the file. I tried on Chrome, Safari, and Firefox on macOS.

UPDATE: I figured it out with the little check box.

[muchacha_grande]

The button is the checkbox beside the filename