I am using Android Studio 1.3.1.
After going to Help->Check for updates it says Android Studio 1.5 is available in the stable channel. However I only have the option to Download this update which takes me to the latest updates pages in the canary channel:
http://tools.android.com/download/studio/canary/latest/
I thought I would be able to download a patch to update from 1.3.1 to 1.5 but it seems like the only option is to download the entire IDE - is this right ?