0.9.24.1 is unstable, it always get stuck in flashing firmware. It is recommended that you stay on 0.9.23.1/0.9.23.2.
Download link - Version [ 0.9.23.1/0.9.23.2 ]
flashtool-0.9.23.1-mac.zip
flashtool-0.9.23.1-windows.zip
flashtool-0.9.23.1-linux.tar.zip
0.9.23.2+patchx10flasher.zip...