deverberation

I've grabbed a video clip from Youtube that I would like to use in one of the courses that I'm building. (I've received permission from the video's creator.)  She obviously made the video without using an external mic and there is an echo sound.  I've got AVS Audio Editor but it doesn't have a deverb tool.  I've also downloaded a trial version of Acon Digital which does have a deverb tool but I can't get it to work with AVS.

Does anybody know how I can get rid of the echo?  Am I overlooking some tool in Storyline video editor that I could use?

Mary Field