i am having the same problem restoring my liscence. I bought MJ in September, (for the 2nd time in two or three years, because I ran out of restores on my first liscence?) and recently installed a new hard drive and reinstalled MJ 8.0.4. The restore page does not recognize my liscence, (no matter how I enter it. IE capital letters or not, dashes or not?) I saved the first MJ key that was sent to me on floppy and tried to install from that, (even though it was more that two weeks old) and I still get the same error message as you "error installing MJ file, unable to open file". I had a simmilar problem with my last liscened program and found a fix on in this forum. I forget who suggested it, but they said to delete your temporary internet files from "internet tools". Restart the pc and try to restore. So far this has not worked for me......is there something else that can be done....