[SOLVED]Problems using USBasp with Arduino IDE 1.6.10/Arduino AVR Boards 1.6.12

pert:
If anyone tries using USBasp with Arduino AVR Boards 1.6.12(included with Arduino IDE 1.6.10) could you pretty please let me know what your results are.

I mentioned it in another thread earlier, Problems with Arduino AVR Boards v 1.6.12, but it looks like this is an equally appropriate place.

I tried Arduino AVR Boards V1.6.12 in IDE V1.6.9 running under Windows 10 Pro 64-bit earlier, and both of my USBASPs failed to work, with the same error as pert:-

avrdude: Warning: cannot query manufacturer for device: No such file or directory
avrdude: Warning: cannot query product for device: No such file or directory
avrdude: error: could not find USB device with vid=0x16c0 pid=0x5dc vendor='www.fischl.de' product='USBasp'

One of the USBASPs has the original firmware, the other has firmware updated several months ago. Neither has the latest firmware mentioned by DrAzzy, (PeterVH/bperrypap 5/18 f/w).

I didn't play around any further, and rolled back to Arduino AVR Boards V1.6.11. Both USBASPs are working fine again now.

When I feel inspired, I might load the PeterVH/bperrypap 5/18 firmware onto one and try again.