Using a Kailh-style switch opener (which has two wide prongs instead of four), position the switch on top so that the two plastic tabs on the side of the switch are positioned on top of the two prongs underneath.

Press very firmly downwards until both tabs unlock.

If one tab unlocks and the other tab does not, reset both sides and try again.

Alternatively, wedge a spudger underneath the first tab and unlock it slightly.

Wedge a spudger underneath the second tab to unlock the top housing.

You may have to reset the switch and try again several times.

During disassembly, the top portion of the switch may fly off due to the spring underneath.