Previous upgrades to the most recent builds have not gone smoothly. Can anyone provide plain English, step-by-step instructions on how to do this properly? Coherence sounds cool but I'm terrified of upgrading based on previous experience. Too much risk. When it's working Parallels is great. It's the install/upgrade process that, at least to me, has not been the most intuitive process. From the looks of other posts, I'm (thankfully) not alone. Thanks in advance!