Updates are only triggered for space platforms arriving at some planet. The mod should work if installed at any point in the game.
Can you confirm the mod not working if you reset platform state after installing the mod and naming the logistic group? (e.g. by toggling "Automatic/Paused Thrust")
Also, the mod does not replace [planet=vulcanus]
with icons - that is standard Factorio behavior. You can use icons from icon selector instead of typing [planet=vulcanus]
.