Graphic format issue in DNG

By mistake users have imported the requirements from word document to RDNG, by making the Images as text artifact format in the RM Module. Is it possible to change the format from Text to Diagram at the module level after import?

If the image are in the text format, then the Table of Figures are not generated through RPE using the default RPE template(DNG_Moudle.dta) which available at <RPE_Installation>dir.  Is it possible to change the template to generate the TOF using text format for images?