You need to create a compiled version of the script, specifying your username and password when exporting. Actually, this is what the premium version is for.
You can fill in the whole form with one action if you
use <TAB> in "Text to type" input field. It acts as you
actually pressed TAB button on keyboard. You can even
use <RETURN> at the end of form filling to submit form
data - it acts as if you pressed ENTER button on keyboard
to submit the whole form data.