Link to 'create new page' not working

This is a great theme and it’s working well for me, or it was until yesterday. Now if I click on the NEW button and select ‘page’ (it’s all pages for me, no posts on this weblog), it takes me to the list of all pages instead of the screen where I could start writing a new page. The “add new” button is missing from all the usual places. I’ve been hobbling along by restoring pages in the trash and editing them, but I’d like to fix this. Any suggestions much appreciated.

thegildedhour.com is where you’ll find the weblog in question. If you need log-in info I’m happy to provide it. Thank you.