Bingo. I went into the download that I had on 4.1RC and reextracted the files. The computer rebooted the program and I am now happily downloading the three shoots. Thank you for stimulating me to reassess what I had done. The reason that it ocurred originally and was corrected by reextracting is beyond me. As an older photographer with 50 years experience, these computers are sometimes unnerving. I started computers in the 1960's with the fortran program and a relay built computer, scary, huh.