Build Server tests fail after Typemock 7.3 upgrade

I downloaded Typemock 7.3 and upgraded from 6.0.10 and all my C# unit tests passed when run locally within Visual Studio 2010 Premium. We Upgraded our TFS Build server with the 7.3 server software (also from 6.0.10.0) and newly submitted builds are now failing with almost 45% of our unit tests reporting the following Exception:

Test method Ellucian.Dmi.Client.Test.LegacyDmiClientUnitTest.SendBytesUnitTest threw exception: 
TypeMock.DesignModeException: 
*** Faking non-virtual methods is not possible in InterfaceOnly design mode. Use [Isolated(DesignMode.Pragmatic)] to fake this. Learn more here https://www.typemock.com/isolator-design-mode

Of course, when I add the suggested Design attribute:

[TestClass(), Isolated(Design = DesignMode.Pragmatic)]

and kick off another build, I then get the following Exception:

Test method Ellucian.Dmi.Client.Test.SecureLegacyDmiClientUnitTest.SecureConstructorWithCertificateHostnameOverrideUnitTest threw exception: 
TypeMock.TypeMockLicenseException: 
*** You are using Isolator Basic version, which does not allow Pragmatic design mode.
Would you like to try the Complete features? Click here: https://www.typemock.com/

The person in charge of licensing is out today, but the last information I had on our Typemock 6.0.10 TFS Server license is that we purchase

Typemock Isolator - Build Server Edition (1) License

and I don't see anything like that for download.

Is this a simple matter of there being a different server version we should have upgraded to? Are there other changes I need to make to the previously working Typemock 6.0.10 unit tests to get them to run on the build server with 7.3.0?

Thanks for any assistance... (especially since our builds are now failing until I figure this out, and/or until move the 200+ failing tests to a non-build unit test list).