I'm using iBlue747b with BT747 v1.61.3 (non-desktop version).
I noticed that if I abort a log dowload, the device become (partially?) unresponsive. I can't use BT747 or even the original application untill I switch off and on the device again.
If I abort a dowload using the original application, aborting takes a while but the device is fully functional at the end. This may suggest that there is some special operation required upon aborting log dowload to leave the device in a functional state.
By the way, I also tried if there was a difference in using the bluetooth connection or the usb one: no difference.