first of all, normaly all issues are taken care of. second, it´s always a good idea to write in places where you can expect to get support. When Stewart is not answering here the threads, it might be that he simply does not check all forums on internet everyday. If he would do so, then Greenworks wouldn´t be possible to release new stuff at all.
There is a Xfrog usergroup and soon there will be even be more. And on this usergroup you not only get help from xfrog users, this group is also closely followed by Greenworks.
You always have to keep in mind that on company addresses you recieve dozens or hundreds of spam mails and sometimes an important mail can slip or is filtered. That is for sure not nice, but I think its important to faith the real world ;-)
I mean even a small freelancer like me gets so many spam mails, I really don´t want to know how much Stewart gets on all xfrog addresses.
best,
Walli