The problem relates to .NetNuke version 7.0.3.
My 2 problems with the file manager are:
1)The system will not let the user select your sub folder to
unpack the zip file.
2)I created new subfolder one level below the folder with the uploaded zip file in. The system let me select this, but when I clicked ok the page reloaded and the images in the zip file hadn't been unpacked.
Has anyone else experienced these problems and could shed any light as to how to fix them?