No SlideProof Buttons / SlideProof add-In is disabled (after every restart).
If you find that SlideProof get's de-activated on start of PowerPoint you have to delete the registry keys here:
CurrentUser\Software\Microsoft \Office\14.0\Resiliency\ DisabledItems
CurrentUser\Software\Microsoft \Office\14.0\Resiliency\ StartupItems
CurrentUser\Software\Microsoft
The issue pertains to something very company IT environment specific and we are working on an easier fix.
Please also check section 3.1 http://www.veodin.com/slideproof/troubleshooting/ to get the registry fix.