Error with Free version

I am not able to test the free WPcomplete plugin, as I am getting error messages on the plugin dashboard, such as the below:

Warning: include(partials/wpcomplete-admin-settings-checkbox.php): failed to open stream: No such file or directory in…..

I have disabled the plugin, deleted the plugin and uninstalled it, but this still appears. Would it be a problem with the uninstalling process? I would think that when I reinstalled it things would return to how they should be?

(Note: I installed and activated this a few months back and it was working, the only change was that I disabled it)