Desktop Air Publishing requirements.

I am very new to any kind of device publishing. I have looked at a fair amount of internet information with regard to this and I am now absolutely confused.
I am using Flash Professional CC....which I purchased yesterday.
When I have an Fla and set my publish target as Air 3.6 for desktop. None of the "Output as " selections bold under the General tab. ie: I can't select "Air Package" or anything else .
I have successfully installed the Adobe AIR 3.9. Do I need to download ,"Adobe AIR SDK & Compiler (version 3.9) this as well". Why is it the selections are not available to me and how can I make them be available to me.
Thanks
mango

I sorted it out my problem was working was working sequentially. I tried to fill out "general tab" before I filled out the "Signature tab". When the signature tab was dealt with the options in the General tab were selectable.It's stuff like this that drives inexperienced people around the bend.