Keymap on Logitech keys-to-go

Hi,

I'm using a Logitech keys-to-go keyboard with my Nexus 9 (Stock Android) which works pretty fine. The only thing that's annoying me is, that when pressing the button for the "mail" Application the gmail App is started.

Is there any way to change the setting to the "inbox" App? I've already checked the "standard app settings" in gmail, but it is not set as standard.

Any suggestions?

cheers,

bigtreiber