Rated 5 out of 5 stars
Home website is apparently death (several months).
I modded last version (5.6.14) to FFmaxVersion = 8.9
Tested OK in FF6 stable, FF7 beta 2, and FF8 (aka. Aurora) alfa 2.
Thanks to passerby for finding the last version.
Guys, consider an alternative project with life as MAFF (also supports MHT).