hi, i have the new, and want to replace the old in a VM of Windows 8.1 Pro Preview and it's not working Scotty. I keep getting the error message attached when I try to install 12 or uninstall 9. MM12 gets almost all the way thru the install and then barfs. The link to \vmware-host\shared folders\desktop works fine in the windows environment, just not with the MM installer or uninstaller. Not sure what else to do but blow away this win image and start fresh. arg.