Frequent Runtime Exceptions when using Welkinsuite.

I frequently get a runtime exception when I edit visualforce pages in Welkinsuite.

The exception message says:

============

An exception has been encountered. This may be caused by an extension.

You can get more information by examining the file

'C:\Users\rmahendravada\AppData\Roaming\Microsoft\AppEnv\12.0\ActivityLog.xml'

============

It's frustrating. I have attached a screenshot and the ActivityLog.xml file.

Greetings,

Thank you for your contacting us with this information.

I kindly ask you to re-install the Microsoft Visual Studio 2013 Shell (Isolated). One of its dll files was missed during the previous installation, and this causes the error during your work on Visualforce pages.

Please let us know if the issue is reproduced after this.

Thank you,

Kate