for JavaFibs (goto 3DFibs)
Go to the JavaFIBS menu and chose New User....
The Registration dialog opens and you enter your desired Username and Password. Please confirm your password to avoid any misspellings.

for 3DFibs (goto JavaFibs)
When you click the Connect button in the upper tool bar the Register dialog opens. Enter your desired Username and Password and click Create my new account.