The second is the more standard windows help file. Of the two, the guide is the better written, though some learning of the terminology is necessary. Before beginning on an actually project, take time do a practice project. Some features require double clicks while others are single clicks. Text and button shapes are two of features that require a double click.
Projects can produce multiple sets of buttons for different languages.
ButtonFly defaults to American English and French. The second language option can be turned off in the Data and Generation windows. Text names for buttons are entered in the Data window. Each language selected has its own column. ButtonFly doesn't do translations to other languages, so it is up to the user to in put the correct translations in all the columns.