Kieth,
If she can open the file and save it as ASCII text, any software will read it. I doubt that she has an option to save as RTF. The IIGS was discontinued about the same time as RTF was becoming a standard 'save as' option.
Keep in mind that Appleworks on the IIe, IIc and IIGS was totally different from the Clarisworks 2, 4, 5 and 6 versions on the Mac. Claris was discontinued and the next software release was called Appleworks. Maybe they think we have short memories.
It is like Filemaker 4 being purchased by Claris and repackaged as Filemaker II. that is the only time I can think of a version going backwards for a newer release.
Jim