RE: MP!L Not Working
It IS Bitdefender! More specifically, Active Virus Control (or atleast what its called in the 2012 version). I stumbled upon this when I noticed that MP!L was suddenly working today, and so I was setting it up for the first time, and thought it had fixed itself. But then I found out the the AVC wasn't enabled, so I tried to enable it, but it kept failing. This is because I had to do a hard reboot on my computer, since it froze; which corrupted "vsserv.exe", which is the AVC service for Bitdefender. After updating Bitdefender, which repaired vsserv.exe, MP!L disappears again. I turn Active Virus Control off, MP!L comes back! So it is Bitdefender's Active Virus Control. I have tried adding MP!L's applicates to every sort of excepmtions list I know of, and no avail.
Bottom line: If you have Bitdefender, with Active Virus Control enabled, then you most likely won't see MP!L, since somehow it's blocking it. However, I believe that it is an essential part of protecting your computer from threats, and do not recommend you disable it. If you do, do so at YOUR OWN RISK!
Also, a note to the developers: It may be beneficial to look into why Bitdefender is blocking MP!L. Perhaps get in contact with them about the issue. Because for some reason, Bitdefender is conflicting with your application, and as a end-user, and in the field of IT, compatibility is a must!