Don't you think it would be better to provide the people who are trying to provide assistance with the information they request?
I have used the official arduino-fwuploader tool quite a lot, and am peripherally involved in its development, documentation, and maintenance.
You seem to feel that the alternative tool you learned about is significant in some way, but you have only provided the most vague of information about it. There is a good chance that I or one of the other forum helpers could identify that alternative tool if we only had more information than what you have deigned to trickle down to us.