Oh, wow, you're not kidding! That's an ancient version from 2014. You cannot uninstall it because it predates your current Joomla and PHP version by nearly a decade. Its uninstallation script won't work, of course. Too many things changed since PHP 5.6 and Joomla 3.2.
That said, you're in luck. I have a new component which can deal with leftovers and other problems in Joomla extension management, Onthos. You can download a dev release here: https://cloud.foxandbearden.com/s/bpcfjJ9EegEZSxM Install it, go to Components, Onthos, select the leftover component and from the toolbar click on Danger Zone, Forced Uninstall. It will remove it without a problem. This feature is the "nuke from high orbit" option; it removes an extension bypassing the Joomla extensions manager and the extension's uninstallation script.
Note: you may have to remove the #__ak_profiles, #__ak_stats, and #__ak_storage tables yourself, if they still exist on your site. I believe that these old versions of Akeeba Backup were using the installation / uninstallation script to manage those tables instead of advertising a SQL file in the XML manifest which means that Onthos won't be able to "see" those tables when nuking the old component.
Please let me know how's your experience with this new component. I plan on selling subscriptions to it for a very small amount (about 10 Euro, just to cover the cost of the occasional support request).
Nicholas K. Dionysopoulos
Lead Developer and Director
🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
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