poglako - I never used bt on any computer. So..
But I see when you right click on the trisquel icon on the panel (the one
that opens the gnome menu) and then click on Edit Menus and select
Accessories there you can check the box Bluetooth Device Setup. After that
you will find that entry in the accessories and when you open it should start
searching for bluetooth devices and also you should be able to thinker with
the setting (maybe!?!).
As I said I don't know anything about bt and maybe this post is hot water..
cheers!