Plugin not Responding , and cant be uninstalled

I have this plugin installed, which has been working, but now comes up with a php error, and also is not saving changes, e.g. i cant edit the shipping zones, they will not delete. I have also tried to delete this plugin , but it will not reinstall. It is creating alot of pain for me today. Unsure why it is hanging each time i try to save settings. Please Help