How do I correct the UMIK-1 calibration file to reflect a gain setting change in the PCB

[astolfo]

My UMIK-1 came with the 011=18db gain settings but I need to adjust the gain as I can't get the input/output to match with all the gain settings maxed and the sweep level at -24db.
To what gain should I go in the PCB and how do I adjust the calibration files to the new db gain?
Thank you