Error when I try to check off POV-Ray 3.7 in Add-ons When I try to add POV-Ray 3.7 to Blender 2.75a in Windows, I get the following message:


  Report Error
  Trackback (most recent call last):
  File "C:\Program Files\Blender Foundation\Blender\2.75a\2.75\scripts\modules\addon_utils.py", line324, in enable mod=import(module_name)
  File "C:\Program Files\Blender Foundation\Blender\2.75a\2.75\scripts\addons\render_povray_init_.py", line 56, in from.import(
  File "C:\Program Files\Blender Foundation\Blender\2.75a\2.75\scripts\addons\render_povray\render.py", line 32, in from.import df3 # for smoke rendering
  
  ImportError: cannot import name 'df3'


I've downloaded povwin-3.7-agpl3-setup.exe, povwin-3.7-editor.exe and povwin-3.7-editor.exe into a folder on my desktop. I executed both installs but the message I got is still the same as stated above. 

Any help is appreciated.
Download the Blender program again when some library is missing (here df3)