Hi,
We see that you might be able to copy the required section of the previous *.mex file to the new *.mex file, as shown below:

Where we copy the same structure of the previous *.mex file to the new *.mex file. As a note, we need to reload the project for the configurations to take effect.
This is just a possibility and not recommend by NXP, since you could encounter situations where newer RTD's have new features (or deprecated some features) which might create problems. Since there are no current guidelines for copying configurations from *.mex to *.mex file, we cannot ensure the correct functionality. We do apologize.
Please, let us know.