In Version 10 the guestbook of Version 9 is displayed correctly according to the new style available in the new Version. The only difference in the Program is that it is shown as HTML Object rather than as Guestbook Object and it will be not visible in the Admin Page of the Version 10.
For your convenience, you may decide to use the new Guestbook Object instead of the old one without loosing the old comments.
To convert the guestbook follow please this procedure:

1. You need to identify the file of Version 9 containing the comments. The file has the following format "gb [idguestbook]" and has no extension. The ID if the guestbook can be found in the HTML code of the guestbook.
2. Insert the new Guestbook Object and start the preview.
3. Export the website and add a comment in the new guestbook. In this way it will be created a new file in the public path assigned to the guestbook.
4. Replace the new file with the old one of Version 9.