The author of the program is active on a1k.org.
He calls himself "woop".
There is a support thread, where you can get help with questions and problems.
http://www.a1k.org/forum/showthread.php?t=41823
This thread is in german, but feel free to write in english.
Btw. Redit is also available on aminet.
http://aminet.net/package/text/edit/Redit