If a user selects or deselects stations on the Suitability or Catchment Descriptors tabs under “Edit QMED Donors” (via button from main pooling group window), then clicks OK or Apply and closes the window, the “Use QMED Obs Deurbanised” checkbox will be deselected/unticked when the window is re-opened.
This issue is resolved in WINFAP 5.3.9767 and above.
The latest WINFAP 5 installation is available here.