This past weekend we released version 3.4 of the GenRocket Runtime. This release is the product of a few months of work to address your top request -- allowing the GenRocket Runtime to work in offline and secure environments.
With this new release, older versions of the Runtime, Profile.xml, and Scenario files on your local machine will no longer work. To continue using GenRocket you will need to complete the steps listed here: Runtime Update Instructions
After you have completed those instructions you can use GenRocket offline or in a secure environment by following these instructions.