Reinstalling IMPLAN v3 issues

I had IMPLAN v3 installed on my system through the external hard drive appliance. I uninstalled this version and have been trying to install a local version. When I try to launch the new installation, it prompts me to re-connect the hard drive appliance. I've tried several uninstalls/reinstalls, deleting shortcuts, and the like and still the problem persists. Ideally, I would like a purely local install on my machine that doesn't require the external hard drive to be connected. Is there a different way to completely remove the old install? Do I need to delete registry keys and if so which ones?