I can give you a full refund for your purchases if that is the route you would like to take.
After you click "aceptar" the interface freezes? I don't think it has anything to do with your DW language, but more likely the user name on your computer having accents and it failing to find the correct files or directories.
Accented characters in general end up causing issues, not just the DW language preference. If you post a US phone number or Skype contact information I can do a screen sharing session to try to debug this with you directly.