The Wingtra data needs to be Pre-Processed in the Wingtra software ahead of import into TBC...
Can the Wingtra software allow users to use their own local base? I think so, but that's probably a question for Wingtra.
So, if you are using a project that is already setup, you are good to go and can skip the calibration import. However, a workflow that protects your project data that you deploy to the field would have you open up a new project, or create a new project leveraging you main project, first.