As I understand your question, put simply, you want to be able to load a binary file (i.e. a selafin file *.slf) and then save the data out (or portions of the data) into a CSV file (*.csv).
First, when you load a *.slf file into the Blue Kenue WorkSpace then you will see a number of objects appear. Each of those objects may be one of the following (simplifying for you):
- 2D Scalar
- 3D Scalar
- 2D Vector
- 3D Vector
The easiest way to know what object you have is to double click it and look at the Properties... in particular, the MetaData tab. Where you'll find something like 2D T3 Mesh.
Now, if you select one of the objects in the WorkSpace you can then use the File menu to "Save a Copy..." of the object to disk.
In the dialog that pops up you will find (at the bottom) options specific to the type of the object that allow you to save the loaded object out to disk in various formats. Some objects allow you to save as ASCII files... so you will be able to get part way towards your goal by using File > Save Copy As...
Perhaps if you explain why you need to be able to to save all of the layers as one CSV file it may lead to new functionality for Blue Kenue. However, the existing functionality is usually sufficient for most people in my current opinion... please feel free to convince me otherwise!
Kindly... Alan