test

HOW TO MAKE CIRCLE IN FIREWORKS
Open image in FW that you want to crop a circle from.
In the Vector section on left, choose the ellipse tool.
Then, on your image (with your SHIFT KEY down if you want a true circle), draw the circle.
You can lower the transparency in the bottom Properties menu...so you can see what you've got in the circle (what you're selecting to crop)
You can use CTRL-T if you want to move the selection around a bit to adjust what you're selecting

Then, with your circle still highlighted/selected, right-click on top of your circle and choose EDIT - CUT.
Then, still on top of the image, right-click and choose EDIT - PASTE AS MASK.