Help in downloading..

Ok, I seriously need help over here.
Im not a computer genius but a friend of the familys is..and we cant really contact him right now cause of how late it is and all.
And we had to wait a few hours for this thing to fully download onto our computer, right?
Ok, so were in the process of trying to download at the moment, frostwire..
see its fine and all, but the gdebi box just says <ok> at the end..but we have no idea how to like, agree to it..
do we press <y> or what..i dont even know..

Please give me a really easy easy simple way too, im pretty much horrible when it comes to computer software..