deleting conversations from freichat

Hi, Im using elgg 3.3 with freichat version 1.0.3 . Can anyone tell me how to delete the conversations with other members in freichat. There's no link or setting to do this. I have contacted codologic from their site directly and thru email and I've received no response from them at all.

Now If no one knows how to answer about freichat, can anyone tell me how to update Elgg 1.8-1.12 & 2.X: Elggchat to work in elgg 3.3?
then I can just trash freichat.