how can I learn to use this software? any tutorial available?

[nishannazer]

Please help me use this software as I believe this allows coupling raster images to system dynamic models which will be useful for my research.

[heralex]

I am working on improving the documentation and am planning to provide some tutorials as well. However, for now I'd recommend reading the Documentation and 'playing' with the sample data and models ... BTW, the old User Guide contains a little HowTo
on creating a simple processing pipeline. There also some notes on Creating and Executing Models in the Documentation section.

Also, if you could give me some idea of what you want to model, I might be able to give you some pointers as to which Model Components you should look at and may be how to structure your model (at a high level).