Typemock Isolator needs to be linked with Coverage Tool?

I'm suddenly getting the following error when running unit TypeMock Isolator tests using SharpDevelop.

*** Typemock Isolator needs to be linked with Coverage Tool to run, to enable do one of the following:
1. link the Coverage tool through the Typemock Isolator Configuration
2. run tests via TMockRunner.exe -link
3. use TypeMockStart tasks for MSBuild or NAnt with Link

Here's the command line being used to start SharpDevelop.

"C:Program FilesTypemockIsolator.3TMockRunner.exe" "C:Program FilesSharpDevelop.0inSharpDevelop.exe"

It never has had a reference to any coverage tool and we don't want to use a coverage tool.

So why would it suddenly produce this error without any other perceivable change in the configuration?

Sincerely,
Wayne