Make sure to update preferences dictionary on add-on upgrade
Make sure to update preferences dictionary on add-on upgrade

Fixes an issue where custom key bindings would not be registered

Glutanimate/image-occlusion-enhanced,Glutanimate/image-occlusion-2-enhanced,Glutanimate/image-occlusion-2-enhanced,Glutanimate/image-occlusion-2-enhanced,Glutanimate/image-occlusion-enhanced,Glutanimate/image-occlusion-2-enhanced,Glutanimate/image-occlusion-2-enhanced