Can't mess with it now...but what's rms?
RMS stands for Root Mean Squared, so I think it represents the average volume level.
For electrical terms it can be the average current, voltage, or power produced from an alternating current source (it is calculated as the maximum value divided by the square root of 2).
Not 100% sure it means the same thing in this case though.
Also, the program is great Tulamide!