Without a backup of your muse on an external HD or in the Creative Cloud or another computer you won`t be able to do updates to your website, I´m afraid. Without a backup you can edit your website with IBE only.
Watch this thread with kind of the same problem: Sito Web made with Muse after PC reboot how can I recover the Site??
you can download the site to Dreamweaver and use those assets to rebuild it again in a new Muse but as Uwe pointed out, only the .muse file will allow you to keep adding updates to the old site... did you have a backup?
Thanks , I did have a backup on an external device but unfortunately it was in my backpack that was stolen also. I am working on an old timemachine backup that will allow me to access
The on line version and then deal with the review. Thanks
Sent from my iPhone
That's really bad indeed. With some technicals in the past, I do since then, a backup on an external hd and a working file on CC.