Guys... my C4 is all but unusable to me

The Neuro Desktop App just always crashed when I try to use it with the C4. Same exact setup works flawlessly with the Aftershock. Whether I plug it in directly or via a hub, using different cables, nothing helps.
I don't know if this is a C4 issue or a Neuro Desktop issue. I have tried reinstalling it but I can't seem to get a clean new installation. When I re-install, I am still logged in... There must be some files left on my Mac but I have no idea where. Can anyone help? Thanks!