We have had some reports that the last NodeXL Pro update has issues on some computers.
The error looks like:
System.IO.FileNotFoundException: Could not load file or assembly 'Google.Apis.Core, Version=220.127.116.11816, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab' or one of its dependencies. The system cannot find the file specified.
We think the reason is that the setup doesn't recognize some dependencies on computers with .NET framework 4.0.
We will be releasing a new version in the next 2-3 days that will fix this problem for computers running .NET framework 4.0.
In the meantime you could try installing .NET framework 4.5 and see if it fixes the problem.
For additional details, please see: