Does anyone know if you can save the installer file to use it later on so that you can update all your programs at once?
I haven't used this service in a while, so things may have changed, but IIRC the installer is really just a wrapper for all the other installers. You can save it and re-use it for other installs, but the wrapper itself is pretty small so I don't know why you'd want to. Try checking a few boxes and downloading the installer - the file size will only be a few hundred KB.
This was my favourite resource for a fresh install about a year ago, and then I forgot it existed :(