Have been having problems opening exported pdf files from Vectorworks 2009 Educational version. All attempts to open in Photoshop, illustrator, and other such programs cause a window to appear that says "PDF Security password: Please enter the Document Permissions password to remove restrictions." Trying to unlock the file in "get info" window does not work either. I can view, print, etc. from preview and Adobe Acrobat but I need to manipulate drawings in photoshop but cannot open them. Please Help!Thank you!