ScanGear driver interfaces differently than other TWAIN Drivers. You can work around the issue by:
1. Open eFileCabinet Online Scanner utility (usually an orange 'e' on the desktop).
2. Go to Edit>Preferences…
3. Under the Settings tab check the boxes for "Open scanner interface at startup" and "Scan button shows the scanner user Interface".
This will open the ScanGear interface when you hit the Scan button in the utility or open the utility, allowing you to scan using that interface and send files to eFileCabinet.