Could someone please help me

i have mysky and the mce remote (the learning one) and i'd like to control mysky with it but not sure how to
i have programed the buttons on the mce remote to change the channel on the mysky decoder
and ive connected the ir blaster to the mysky decoder but don't know how to make the computer send the signal thru the blaster to the decoder
tried using girder but don't understand it

if someone has this set up could they please help me