I have also taken the Freeware SGF editor out of circulation, as well as the Pro game collection. The freeware editor is a headache to support, in spite of my proficiency with IFDEFS, software consisting of 1,000,000+ lines likes to exist in an as simple possible, single version! I am strenghtened in my decision due to the fact that my freeware SGF Editor was boycotted by Sensei's Library and GoBase. I don't see a compelling reason why I should invest a lot of time maintaining a free version if most of the major Go websites are scared of it :)
Make no mistake about it - Moyo Go Studio is hugely popular, in as much as fledgling Go software can be. I can already live of it, if I were to move to Papua New Guinea or Eritrea (I wish I wasn't so afraid of flying and that I had less stuff).
The Pro game collection has been mirrored by some folks, as well as put on P2P networks, so in an effort to keep my operating costs down, they are removed from my site as well.
This leaves me more time to concentrate on my core business: Building the best Go software!