Can't run rqt after removing plugin package

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I've been trying to make my own rqt plugin. After a lot of back and forth, I finally got it to build. The problem now is that rqt won't run. I get the message listed below. In the last line, rqt_mypkg is listed as KeyError. This is a package I had once before, but is deleted from my workspace now. I've tried cleaning and deleting my workspace, removing and reinstalling rqt, removing and reinstalling ros but nothing works. Rqt still won't run. Anyone have any idea what is wrong?

 Traceback (most recent call last):
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/qt_gui/plugin_manager.py", line 454, in restore_settings
    self._restore_settings_save_obsolete()
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/qt_gui/plugin_manager.py", line 469, in _restore_settings_save_obsolete
    self._restore_settings_unload_obsolete_callback()
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/qt_gui/plugin_manager.py", line 493, in _restore_settings_unload_obsolete_callback
    self._restore_settings_load_missing()
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/qt_gui/plugin_manager.py", line 506, in _restore_settings_load_missing
    self._load_plugin_load(instance_id, self._restore_settings_load_missing_callback)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/qt_gui/plugin_manager.py", line 225, in _load_plugin_load
    plugin_descriptor = self._plugin_descriptors[instance_id.plugin_id]
KeyError: 'rqt_mypkg/My Plugin'