It cannot make textures from scratch, as I made it because I needed to make some texture tiles for a game I started working on, and that is why I made the application. I have Texture Maker and PhotoShop, but this is really easy for me to use and makes all the possible tiles I need with a few clicks. I usually get a lot of tools done, and not that many games.
The reason why I limited the application is that people actually for the most part never ever bother with paying for software that is essentially fully functional and wouldn't get anything extra from paying. I know that some does, but the majority doesn't. At least that is my impression.
As far as particles goes, then I have a fully working particle engine, but its for Blitz3d, I haven't gotten around to use my DBPro that much yet. Actually I haven't made a single program with it yet, but most of the tools that people make can be used by anyone regardless of programming language, which is why I have posted here a few times.
Interested parties can try out the first built of the effect editor for it here:
http://zac-interactive.dk/demos/particleEditor.zip
A few of the features of the editor doesn't work yet, but it give an idea about what could be done with the engine.