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You can run the DPInst_*64 if you are on a 64 bit machine or the DPInst if you are on a 32 bit machine for driver re-installation; both of which can be found at C:\Users\<User_name>\Documents\WICED-Studio-6.2.1\Drivers\Windows\wiced_uart. Please check the LED2 status before programming the device which should be off if you are using KitProg firmware newer than v 1.05.
When you face an OpenOCD error like this, the best place to start debugging the issue is by looking at the openocd_log.txt file generated as a part of the build procedure as located in 43xxx_Wi-Fi/build/openocd_log.txt. If you are still having difficulty in downloading through WICED Studio, please attach the device manager screenshot along with the openocd log for further debugging.
Perfectly working now!
LED2 must be off...