Just to let everyone know, even with DFU 3.45C some programs like Wildcat 4.1-4.4 (i haven't tested any newer yet) will FAIL to install on certain machines, even if you use windows xp. I had problems for many months, and the solution was to use a different PC. My laptop uses HM55 chipset don't know why there is incompatibility. Many thanks again to Wildcat for developing awesome software :)
Edit: Just tried WC5, i installed the FPGA under windows 10 and the problematic machine without any issues, again the hex had to be done from the other much older machine running winxp (although it is not an OS problem)