Use this method if the authorization dialog is stuck at 100%, but nothing appears in the window.

1. While the Facebook authorization window is open, press Ctrl+M in Windows, or Cmd+M in Mac.
2. LoFi will launch a web browser to the Facebook page used for authorization.
3. Follow the steps until the word Success appears in your browser. It may be automatic if you have done this process before.
4. Click on the link bar in your browser and select the whole text by pressing Ctrl+A in windows or Cmd+A in Mac.
5. Once the whole text is selected, press Ctrl+C in Windows or Cmd+C in Mac.
6. Now go back to LoFi and paste the text in the dialog, using Ctrl+V in Windows or Cmd+V in Mac.  Press OK.

The "Upload to Facebook" dialog should now shrink and the Upload button should be enabled. LoFi is now able to post photos to your Facebook.