The 4.3.0 software will not open without a physical USB security dongle inserted into the computer. Ensure the blue or yellow light on the dongle turns on.
This is a known concern when using multiple QRMA units for comparative testing. If two units produce vastly different results on the same subject, the likely cause is calibration differences or sensor wear. Solutions include checking the software version on both machines (both should run the same version), cleaning the sensor surfaces, recalibrating both devices through the calibration menu in the software, and testing in the same environmental conditions (temperature, humidity, and electromagnetic interference). Quantum Resonance Magnetic Analyzer 4.3 0 Software