I have had the same issue now when upgrading from beta 3 to beta 4 and from beta 4 to beta 5.
I shutdown my VMs (complete power off) and then quit out of parallels. I then launch the Parallels installer. The installer does not detect that it should be doing an upgrade. The installer then proceeds to perform an installation which completely hangs the machine.
I have to do a hard powerdown and restart. I then run the installer and everything works fine.
I have a 2.0Ghz MBP with 1GB Ram.
-Will
I shutdown my VMs (complete power off) and then quit out of parallels. I then launch the Parallels installer. The installer does not detect that it should be doing an upgrade. The installer then proceeds to perform an installation which completely hangs the machine.
I have to do a hard powerdown and restart. I then run the installer and everything works fine.
I have a 2.0Ghz MBP with 1GB Ram.
-Will