Originally Posted by COBRARACING

The broken link is fixed please download the usb link 3.4 from the hobbywing website below are the improvements made to the usb link software.

Version 3.4_131202
The Version 3.4 is suitable for the following ESC:XERUN Series*Car*ESC (Version 2.0/2.1/3.0/3.1*and later)
EZRUN Series* Car ESC (Version 2.0*and later)
PLATINUM Series helicopter/airplane ESCHobbywing USB Link V3.41. *
Database*for*car*is updated to the latest Version "130814",
Here we release the new firmware V103_130806-Beta for XERUN-150A, XERUN-SCT-PRO, EZRUN-150A, EZRUN-WP-SC8 ESCs, and following improvements have been made on the former version:1). Excellent startup performance at low RPM greatly improved the linearity.
2).*The acceleration is much quicker than before. The new firmware eliminates the discontinuous speed jump in the old firmware, now its control feeling in sensorless mode is very near to the control feeling of sensored brushless system.3).*Compatibility with Tenshock sensored motor has been observably improved.
4).*Supports motors with higher KV. The new firmware solves the trembling problem occurs to some high RPM multi-poles (>=4 poles) motors at part throttle.
5).*The new firmware is “SAFER” than the old one.*a). It doesn’t allow the neutral throttle point coinciding with the full throttle point, while the old firmware allows user to set them to a same point. Therefore, the new firmware eliminates the possibility of unexpected full-speed running when the ESC is switched on. Undoubtedly, it makes the whole system safer for users and crowd nearby.*
b). When the ESC is switched on, the motor can be started ONLY if the ESC detects the throttle signal is correctly in the neutral range. If the throttle signal is out of the neutral range, then the motor cannot be started. This also makes the entire system more secure for RC car drivers and people close by.*
2. *Bug Fix for USB Link Software(BUG: when updating the LCD firemware program, the progress bar often gets lost)