Hog 3 DMX Widget question

I purchased a used Hog 3 widget, the older style with the blue anodized finish. When I try to assign the Widget it says 'Needs Upgrade'. I'm confused because it is a Hog 3 widget so why would it need an update to run on Hog 3 PC?

Second question, if I try to run Hog 2 PC it never sees the widget at all in the config screen. I thought a Hog 3 Widget was backwards compatible to Hog 2 PC?

Thanks
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