Twonky Media Accidently Upgraded with QNAP Firmware Upgrade

I'm just wondering if anyone else has had the same experience as me when upgrading QNAP firmware following the Bash/Shellshock vulnerabilities - namely that Twonky got upgraded too! - from version 6 to version 7. I've no idea how this happened but I really didn't want this because now I've lost my custom menu trees. My main question is: is there any way I can uninstall version 7.2.7 and revert to 6.0.39? Any advice much appreciated.

Thanks
Bish