You can only reset a password through Filmon.com website (for security purposes).

Go to www.filmon.com . You will see the white panel with navigation button on the left side.

Press the login button: 

Choose the option "forgot password"

Submit your registered account/email on filmon in the field "Your email". 

Another way to get a password reminder is to visit the page http://www.filmon.com/user/remind