Is there a maximum number of TM providers allowed in Studio 2014 Freelance version?

Hi!  I downloaded TermInjector for Studio 2014 but can't see it from the list of available TM providers under Add in the Translation Memory and Automated Translation window.  There is a total of 12 TM providers when I click on the Add button, and I wonder whether 12 is the maximum number allowed for the Freelance version.  If that's the case, how can I remove some of the providers that I do not use? 

Thank you in advance for the information.

Chunyi