I have a 2017 Buick Regal GS. Read, what I thought, was the entire calibration with an older version of editor, not sure what version, maybe 4.0. I don't think it had the ECM and TCM type listed when I read the calibration. I added two credits on my MPVI cable and licensed the calibration. I open the calibration and the engine tabs are blank. I download the newest stable version and read the entire calibration again thinking I needed a newer version. Saved over previous calibration written by older version. I always save stock files in a read-only directory. Tried to resave in a different directory so I could start editing and it would not allow me and that I needed 4 credits to license. Looked into license info and it seems I licensed the TCM, T43. I know once credits are gone they are gone but I'm wondering if the 4 credits is ECM only or both ECM and TCM and if I just wasted 2 credits licensing the TCM only.