David Musgrave looks at How to Fix a This version of Support Debugging Tool is incompatible Error This one bit me recently. Thanks Dave for making this available to everyone.
How to Fix a This version of Support Debugging Tool is incompatible Error – Developing for Dynamics GP – Site Home – MSDN Blogs
Archived post from 2012. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.