There's another Word Processor you could try out and see if it works. It's called FullWrite Professional.

I happen to have a copy of version 1.1, bought from GoodWill a while back. The box is in bad shape but it has all the documents and disks. I've never tried the program out because I don't have a Mac with Mac OS 4/5 on it, it might work with system 6. No idea.

It turns out that back in 1998, FullWrite Profressional 2 was released as freeware.