How do you update an AIP installation of Acrobat Standard 10.1.1 to 10.1.7 without uninstallation?

I am attempting to to update my clients to Acrobat Standard 10.1.7 from 10.1.1.

They were installed via command line during the machine build using an AIP of 10.1.1.

I have created a new AIP for 10.1.7 so future installs will already be at 10.1.7.

I DO NOT have SCCM and can't afford it.

I need to be able to do this via Group policies, or scripting.

The only way I've figured out to accomplish this is to do a full uninstall of the product and reinstall from a batch script.

There has got to be an easier way.

Please let me now if there is any way this can be accomplished without the full uninstall.