Problem
So I've been getting an error when trying to use a previously working .PFX to sign the assembly of my code within Visual Studio 2013 Ultimate.
The error in question is
I have researched this thouroughly before posting this question.
Steps I have tried
All resolutions relevant to me in this other answer. The question is 4 years old, any further known resolutions I can try?
I was thinking perhaps just wiping all trace of the certificate from Visual Studio and my PC? How would I go about doing that?
My Signing settings.