The response I got:
Dear Valued Client,
Thank you for contacting RootsWeb regarding our WorldConnect trees search. We regret not getting back to you sooner, as well as any difficulties you may be experiencing, but are happy to help.
Unfortunately, at this time the Advanced Search fields are not available, and we are continuing to work on restoring the Notes, Sources and Events to the trees. It is a work in progress; we expect these functions to return, although we cannot provide a specific time as to when it will happen.
You can currently search by first and last name, and you can also add in the year of birth or death, and birth or death place as well. Adding this information can narrow your results.
We are also still in the process of restoring all the trees to the updated WorldConnect; we are currently at 90.92% completion. However, in the restoration, the URLs to the trees are being changed. If you attempt to access a tree using an existing link, you should be automatically redirected to the new page. If not, you can use this:
https://wc.rootsweb.com/search.
Once the trees are restored, we will begin working on returning them to full functionality. Some tools are available, others have yet to be developed.
Rather than take the site down while we update it, we are gradually transitioning into the new site. Thank you for your patience and understanding. If there is anything else with which we might assist you, please let us know.