Since you upgraded the phone, you already have the usb drivers.
Now, launch the QPST configurator.
Click on "add new port"
Type the port number your phone is using now. (you put it COM5, COM10, etc, its just one example)
Now, lets download NV editor. [Download the Editor
launch the NV editor, maximize the window.
on connect, select the com port, and press connect server.
press the file button and select upload all from mobile
Then, press the search button, and type "447"
Move the file to the "selected" window.
Once you double click it, in another window you will see loads of firlds with 0
Change the to 1, all of them.
also, change the string value to "true"
Now, you press the "file" button and press "download selected & active to mobile"
Disconnect the server, close the program, unplug the phone, and restart the phone.
Now, try to enavble the bluetooth.