I have added the default value setting of m_DownloadEstimation in indi_toupbase.cpp

from line 2063 you shoud find this code

HRESULT rc = FP(put_Roi(m_CameraHandle, x, y, w, h));
if (FAILED(rc))
LOGF_ERROR("Error setting camera ROI: %d", rc);
return false;
I have added this line.
m_DownloadEstimation = 10000.0; // set Download Estimation to default value --> this value will be adapted when the next frame was downloaded

I still try to get familiar with git...

CS, Max