I have never used FTM so I cannot visualize what kind of report you would want to save in .rtf that you wouldn't want to put into UFTree right now.
But, I do know, I can save any file I create in WordPerfect as a .rtf file. I only do that when I am going to send the file as an email attachment. I think you can save Microsoft Word files as .rtf. And aren't Word Pad files .rtf? And, of course, anything created and in Ultimate Family Tree Editor are .rtf.
So where do you want to save a report to? And what is in the report?