Okay, this has been a long time coming. But now you can use the "Edit Logo" button to make changes to the logo after you created it.
So create a logo, then either click "Download Logo" to save it to your computer,
Edit Logo: to make more changes to it
Email Logo: to email it to yourself or friends
Print Logo: to put it on a page by itself, so you can print it
FTP Logo: to send it to your website (using FTP)