Is there any way to export comments from Komento (in Joomla 2.5) to Excel or another type of document?

I run a couple of different courses through Joomla, and use the Komento extension to facilitate commenting. A new cohort will be starting a course in early February and its easy to disable the comments from the previous cohort, but I'd rather clean them out of Komento (but avoid deleting them).
Any help would be appreciated!