Pulse Ambassador has changed (original program did not require a log in or password). They no longer support the home embroidery formats.
I called this to the attention of ATG administration last summer and they said they would look into getting another program. They have not as far as I am aware.
I suggest you download and use Wilcom Truesizer. It is a free conversion program. http://wilcom-truesizer.en.softonic.com/
I found this video tutorial that explains how to use WT - http://www.youtube.com/watch?v=6UO16Fr1aTs&feature=related