Yes, the new version of Digital File pro should have this problem fixed. try double clicking the Digital File Pro server behavior to edit it, on the second page, check to see if the default File value has been retained. If not, try selecting the hidden form element again, this time use the enter key on the keyboard before clicking the OK button.
If you still have problems:
Please compress your update page into a zip file and send it along with your reply so I can examine the code to see what the problem may be.