B9 Editor is for taking your slice files and making the .B9j file
B9 Creator is the program that runs the printer, you load your .B9j file and then this program controls the printer and outputs the slices to the projector.
To make your slices, get the Slic3r program, in the Slic3r settings, go to the Printer tab and set the print dimensions to whatever you're using, I don't think the extruder setting changes anything, but just in case, set it to your Z axis size, so 0.05 for 50 microns or whatever. I don't think the filament setting does anything either, but again just in case set it to 1mm (lowest it will go)
In the Print settings set the layer height to whatever you're using and then set the Infill Fill Density setting set it to your layer height as well, so 0.05mm
I've had it give really crappy results, but this one did just fine. Make sure to save your configuration settings.
Then to slice your mesh, go to File>Slice to SVG it'll ask what file and then where to save.
In B9 Editor, go to File>Load Images, then you can view your slices, if you click Enter Support Mode you can create support structures yourself, or you can at least view areas that are problems, red is surfaces that are facing downwards, green is facing upwards. So if you see a lot of red on a slice then you might need to add support there.
Best thing for now to do support is to make support structures manually in your 3D program, until the software is updated to do them automatically.
EDIT: Also the B9 Creator software is available in the Comments section of the Kickstarter page