how do you go about switching between them?
I am not 100% sure, but to my understanding GSE will automatically switch true the macro versions.
For instance, when you are groupless, GSE will switch to the standart macro.
Edit: ups, i did misunderstood “macro versions”. In that case like enix said, 3 different macros = 3 different keys.
Code + Macro + Code = Blackbox