Well, I visited the Unication.TW site and had a poke around there. I decided to use the 'Log Extraction tool' that was in the pager section. Data was sent off. Link to the tool here:
Log Extraction Tool
To my surprise (a pleasant one) I received a reply within 2 days with links to the new 1.31 firmware and pps.
I've upgraded and have NO problems so far with my audio mute issue.... fingers crossed it stays that way.
I'm very happy my issues was 'heard' by the manufacturer and support came back in a timely fashion. I'm not sure if my software is some sort of beta version but it's looking ok. I haven't tried out the import functionality yet.