Well I really don't know, only thing that I did was make it show progress when using freearc, since there were 3 descriptors instead of 2, I just combined them somehow, and that's it.
Plus it gets updates almost everywhere or whenever there is a bug that was detected.
http://nishi.dreamhosters.com/u/rawfilt_v1l.rar
Source:
http://encode.ru/threads/1399-reflat...mpressor/page4
This came today, just replace reflate.exe with new one, it will probably work with old one.