We understand your frustration and difficulties with the new Adobe Express!
We've been working on improving the app experience and have come up with updates that might help you with these issues. We kindly suggest going through the details provided in this announcement post: https://community.adobe.com/t5/adobe-express-discussions/updates-for-the-new-adobe-express-as-of-aug..., where you can find, steps to resolve problems such as Webpage Conversion and Migrating all folders & files issue.