Hi
Thanks for your inquiry. Aspose.Words still does not update TOC fields. This feature will be supported, but currently, I cannot give you any estimate regarding this.
The only workaround is updating fields inside the document manually (ctrl+A and F9) or using macro. See the following link to learn more.
http://support.microsoft.com/kb/832897
You can use AutoOpen macro to update all fields in a document automatically, when someone open the document. However, this approach will not work if macros are disabled.
Best regards.
Alexey Noskov
Developer/Technical Support
Aspose Auckland Team