Update hanging: Adobe Acrobat 11.0.15

When I click to install the update Adobe Acrobat 11.0.15 (I'm working on an iMac, late 2009), the download goes through just fine, and I get to the "Installing update" bar which loads all the way to the end and then hangs, with the little arrows on the Adobe Acrobat Update icon going round and round for hours and hours until I do a "Force Quit." I've restarted the machine and tried it again. No luck. What should I do?

If the answer is de-install and re-install, is Adobe Acrobat something I can de-install by simply dragging the Applications icon to the trash, or do I have to be more careful about it? (I have learned from experience that not all apps can be de-installed by simply dragging the icon to the trash.)

Thanks,

Dan