You can edit your tree options using this link:
http://wc.rootsweb.ancestry.com/cgi-bin/igmuser.cgi...Or you can access the tree edit feature from
https://myaccount.rootsweb.com/ Or if you also have corrections to make to the tree itself you can always create a new GEDCOM in your genealogy program and upload it using the same account information you used for the tree you want to replace and the new tree will replace the old one.
Joan