Press Win + R , type regedit , and navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Opander\CPR\Status Look for a DWORD value named ForceFixedMode . If it exists and is set to 1 , double-click it and change the value to 0 . If the key does not exist, create it and set it to 0 . This manually disables the "Fixed" assertion.

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Lacks real-time electronic feedback (QCPR) screens.