This engine is making me think if I should spend money on it or not, and I think not, you know why, because I work so hard to do a project and the five minutes later it crashes, says not responding and gives up and I lose all my hard work. Secondly the saving thing is annoying it takes so much time to load and to backup and that is not really fun because after I save 10 minutes later it crashes and I have to start from square 1 again. One thing that you should add to this soft is auto save and a recover unsaved projects or to make an on-line version(if you don't have one).this has got me to the point that only God knows what I will do. please try to fix this.