You're gonna have to open the switch in order to change it's "modes". Not ideal IMHO as Zealio/Gateron top housing are well known to become looser & looser with each opening. Also these will only work as intended with HS & solder boards that have a plate with switch top opening cutouts. I think these are gonna be a pretty neat novelty switch to mess around with, but not gonna be worth daily driving in a high end board.
Edit: On second thought they make be worth DDing in clicky or tactile "mode" since I believe these are using an SKCM ALPS like leaf to generate click & tactility. TBH though, I'd rather see Zeal release 2 dedicated switches for them instead of the transforming gimmick.