I am currently trying to add the save from http://www.xpgamesaves.com/topic/82143-diablo-3-all-blacksmithgemcraft-plans/page-1 and am stuck unable to use it after Winrar decompresses it and don't know if it is this pc, the file, winrar or Horizon messing up and hope to get this resolved. Thank you for at least looking at this and hope I have a solution soon.
I just downloaded and unrar'd it and Horizoned it. and transferred it and played it no problems. So it must be something on your end.
Download Win Rar & Horizon again .. if it still does not work after you have done that, try and re download the file Can you post a screenshot ?