Cubase Artist 6.0.2 slow to close (5')

Since I have configured my Juno DI in Midi device, Cubase Artist 6 takes several minutes to close. An analysis under Seven shows that during all this time it accesses to the file “Midi Devices.bin” then closes correctly.

I got the Same Problem on my Mac in 6.0.4

(i didn’t checked what it does in that time)