Problem:
When creating a new category, Category Title and Category Name (path) are required, ADP will not give you an error if you create a category with these fields empty. ADP will remove almost all files on your web site if you try to build static pages with one of the categories misconfigured. This bug does not affect ADP if you're not building static pages.

Solution:
If you're going to build static pages, then make sure that all of your sub/categories have Title & Path set.

Thank you Mirko Baschek for reporting this bug.

For good measure, this issue should be resolved in ADP 1.3.5