I'm trialing PDM8. Installed on late 2012 iMac. Running Win8 Pro (OEM full version) as VM in Coherence Mode (windowed mode doesn't work at all anyway). Windows Desktop won't open at all. Windows Store opens if I access through Modern Apps>Store (though not directly if I just select store) but mouse/trackpad acts erratic and won't access any info off screen. BTW, had PDM6 on a long dead machine. SN# accessible through Parallels website. Is Upgrade an option? Could not find answers in forum. Need answers before I buy.
