In short - I would like to suggest a future version of Serv-U where clients don't have to rely on Java support. Many companies does not permit it any longer.
Please.
I believe this is planned for a future release which is good news..
https://thwack.solarwinds.com/product-forums/serv-u-ftp-mft/f/forum/1603/what-we-re-working-on---serv-u-ftp-server-serv-u-mft-server-ftp-voyager
If you hear when this might be, please let us know.