Hello Ben,
I have been looking for a solution to this problem for a few days. I think I can hold some things...
Below is a screenshot of the issue:

After replacing the dll files in the folder of the extension. I can connect to the CRM using the Global Discovery. The new dll files are from tha latest SDK version..

Result:


I thought I could solve the problem...unfortunately not! Indeed, I receive the following error at the time of deployment:
Could not load file or assembly ''CrmLibraries, Version=8.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 or one of its dependencies. The located assembly's manifest definition does not match the assembly reference.

After copying also the CrmLibrairies dll. I got the same error while connecting to the CRM:

I am still in the process of finding the solution to the problem. I would like to share my current progress though.