Bellows Master is fully supported program. You have several sources of information:
Integrated help file. Press F1 key when you are in any of the entry fields in Bellows Master II. Contact sensitive help opens. Many help pages have formulas or images. They have hot spots. By moving your mouse over them the cursor changes. Left click and you get additional information on that item..
The following downloads are available in PDF format:
Bellows Master II Frequently Asked Questions. File updated 13 01 2017
How to enter new materials. File updated 09 02 2017