Several tries required to update my ST10 allowed the latest '41c' firmware update. However the Tx file can be seen on the screen but it cannot locate the FP file anywhere on the latest downloaded firmware from Yuneec's Support site. Also can't update the most recent CGO2 firmware either. Spent most of the afternoon trying everything, including latest USB drivers on both PC and Mac versions...extreme frustration! All wiring hookups to Typhoon update and CGO2 with connectors are by the 'book'! Still claims no Port 3 connection on my PC and no USB recognition on my iMac, inspite of recommended USB drivers on both. Any clues/suggestions would be appreciated!