HD41 PROFirmware V8.6
http://www.mediafire.com/file/t14pq9mf37dedbe/VORKE_HD41_PRO_V8.6_CN0450_20180521.bin/file
HD41 PRO TOOL V1.04
http://www.mediafire.com/file/aturwtiyiqim0k6/VORKE_HD41_PRO_TOOL_v1.04.exe/file
HD41 PRO Firmware V8.5
http://www.mediafire.com/file/h446dp85ejzwlif/VORKE_HD41_PRO_V8.5_CN0450_20180106.bin
HD41 PRO Firmware V2.3
http://www.mediafire.com/file/z4vx5dfki6n19zz/VORKE_HD41_PRO_V2.3_20170828.bin
HD41 PRO RS232 and update TOOL
http://www.mediafire.com/file/z68334e1p7ataut/VORKE_HD41_Pro_Tool_.exe
HD41 PRO Update SOP
http://www.mediafire.com/file/lt19umrasxzzd0q/VORKE_HD41_PRO_UPDATE_SOP.pdf
RS232 Protocol and Commands Code Info
VORKE HD41 PRO RS232 HEX
http://www.mediafire.com/file/5ks7wwbg2e5333s/VORKE_HD41_PRO__RS232_HEX.pdf
Note: the computer that is upgraded needs a RS232 interface, if your computer does not have RS232 interface, you can buy a USB to RS232 adapter cable（FIDI-FT232 solution）.
