arrrggghhh How to edit change extension menu on blue button to remove add items

[hullstorage]

Hi all
is there a way i can customize my extension (blue) button to add and remove items

i want to remove dream explorer from there and add tsmedia if possible

please help doing my head in!

thanks

 

[soberish]

menu / setup / system / user interface / button setup / have a play in there.