I have an app by them also. Never received any answers to my questions either. I've checked their forum in the past and even there no one was getting any answers. Also their apps have not been updated in a long time. I finally stopped using the app that I had by them and found something better.
Same problem for me too...used trial app, went and purchased and get a licencing issue - purchased on 26/11/2012. I know it's only a �1 but it's a lot of people's �1's how do we get our pennies back?
I was having a similar issue as chilid, so after i came and complained here, i went looking for info and i tried a few things... first i deleted the free trial and restarted the phone and went back to app world and reinstall the purchased version and it worked... i got there a registration code and it was solved...