Yes. Win-fwtool has always been freeware for non-commercial use.
For most technicians, keeping a copy of Win-fwtool-5.3.6.0.zip on a repair USB stick is a smart backup, even if you normally use newer software. Win-fwtool-5.3.6.0.zip Download
: Always try to download firmware tools directly from the manufacturer’s official support page (e.g., Tiger International, Starsat, or the specific hardware vendor). or the specific hardware vendor).