How do I choose which version of Acrobat will be updated?

I have a Mac Pro with one hard drive dedicated to nightly clone backups of my main drive. When the Adobe Acrobat Updater tells me that an update "to version 11.0.02 is available. Do you want to install it now?" How can know and/or choose which version it will update?

Because the cloned backups are stable in their environments, I only want to update the one on my main drive.

Thank you.