I think the instructions are pretty clear, and so do many other users of Form Master.
I feel there is no need for snide remarks.
Have you downloaded and studied the sample forms?
Did you see the part where you can separate class names with a semi-colon ";" and the first class name is applied to the form control and the second class is applied to the containing cell?
Settings --> Form Settings "Table Class" is applied to the outer Table
Settings --> Other Settings "Main Form Table Class" Applies to the Table which contains the form elements
There are many good tutorials on using CSS on the internet.