Can you request a different STAR, landing runway or gate in Sayintentions?

Hello all,

I just tried Sayintentions for free a couple of minutes. I understand that it reads your Simbrief flightplan, and in that manner you can change your flightplan.

But if you are airborne, can you then request a different STAR and landing runway? Or when you are on the ground, can you request a different gate also?

Or can you only change your route by changing the flightplan in Simbrief?

There is no manual yet, and it is not so clear to me.

If somebody knows, please let me know.

Greetings,

Boudewijn