I've synched a one page wireframe from Proto to Creative Cloud and viewed in my desktop web browser okay.
Since then I've added a couple more pages to the Proto Project and synched again. But I'm not seeing the added pages in the file on Creative Cloud.
Do files on the Creative Cloud get cached in my browser? Or is there something else I need to do so I can see the added pages?
There is a hidden feature in Creative Cloud.
When you preview your Proto project, there is Zoom icon at bottom right corner of the thumbnail preview.
Clicking the icon will open up new tab in browser to preview Live HTML of your Proto project.
Please try it out