Help: add Cyclone IV to Quartus II 7.2 version

hello guys,

i am kind of confused on how add Cyclone IV to my quartus, i got the DE2-115 and i am trying to test it but when i checker my quartus , i don't have Cyclone IV.


also i got the update file for Quartus II version 13 but dont know how to update it.


if there is anyone of you could help me with installation and updating , will be so thankful