It already happened with a previous Beta version and it's going at it again. When I start 3186, Parallels launches the OS installation assistant right away. I still have my VM on my HD, but I acess it or perform any operation while the OS installation assistant is open, and when I close it, Parallels desktop closes altogether. What the hell?
Same here I realize that this is an old thread, but I am now having the same problem, with the newest version of Parallels, 3188.