Flash development toolkit FDT used for Altivar drives is compatible with Window 10 from version V4.09 release 03
Download flash development toolkit version 4.09 R03 directly from Renesas manufacturer:
https://www.renesas.com/document/swe/evaluation-software-flash-development-toolkit-v409-release-03?language=en&r=1169901
(Free registration is need on renesas).

Note: If the link is moved, use google search phrase below to find FDT v 4.09 release 03 on renesas web site
fdt v.4.09 release 03 site:renesas.com

Released for:Schneider Electric Thailand