Hi, Julie.
On the off chance you have a copy of digitalCAT, you should also have a copy of digitalCAT's Dictionary Maintenance program. If that is the case, all you would have to do would be to open the Dictionary Maintenance program, locate that StenEd dictionary through the File --> Open menu, and once it's open, click File --> Export, and save it to wherever you want it to be as something like "StenEd.rtf," and that should do it.
If you don't have a copy of digitalCAT, you can send it to me, and I'll convert it for you, if you like.
--gdw