Hello Spencer,
ARA is part of Melodyne editor, Melodyne assistant and Melodyne essential from Version 1.3. Your Melodyne editions do not feature it.
Moreover, Melodyne plugin is one of our discontinued products. Please see
here if you are entitled to a free upgrade.
Regarding your 64-bit question, please see our
FAQ > Melodyne and my computer >
Does Melodyne support 64-bit?