Settings page is blank even after re-install

The plugin was working just fine until it stopped importing automatically in October. I tried to import manually and then it went kaput. It won’t let me uninstall it from WordPress, so I went ahead and deleted it from cpanel on my server. When I reinstall it by uploading it again to my server and then activating it, I only see “DsgnWrks Instagram Importer Options” in the settings page and everything else is blank. I’ve also tried installing the debugger but same result. It looks like I haven’t deleted all necessary data from my cpanel and some info is still hanging somewhere there? Maybe that’s why a reinstall won’t fix the problem? Please help. Thank you.