5160 has been a catastrophe for me. I can't take the time to work out my problems with it now. I need to revert but unfortunately my 4560 .dmg is corrupt or something. I keep getting a "not recognized" error message whenever I try to mount my 4560 .dmg. I was able to revert to 4128 -- that .dmg is apparently not corrupt. I've searched the Parallels site for some way to download a non-corrupt 4560 .dmg, but no joy. I have all the documentation to prove I've bought my Parallels. Could we PLEASE get a link to previous version .dmgs so I can extricate myself from this disaster. I've been at this all day, so the sooner the better, please.