[Khaezu]

For some reason I don't understand, my Sony prs 600 has suddenly stopped being detected by Calibre. Here is the device detection debug:

Version: 0.6.52
USB devices on system:
[u'usb\\root_hub20&vid8086&pid3b34&rev0005',
u'usb\\root_hub20&vid8086&pid3b3c&rev0005',
u'usb\\vid_046d&pid_c221&rev_0170',
u'usb\\vid_046d&pid_c221&rev_0170&mi_00',
u'usb\\vid_046d&pid_c221&rev_0170&mi_01',
u'usb\\vid_046d&pid_c222&rev_0103',
u'usb\\vid_046d&pid_c223&rev_0103',
u'usb\\vid_046d&pid_c525&rev_0200',
u'usb\\vid_046d&pid_c525&rev_0200&mi_00',
u'usb\\vid_046d&pid_c525&rev_0200&mi_01',
u'usb\\vid_054c&pid_031e&rev_031:',
u'usb\\vid_8087&pid_0020&rev_0000',
u'usb\\vid_8087&pid_0020&rev_0000']
Drives detected:
{'E:\\': u'\\\\?\\STORAGE#VOLUME#_??_USBSTOR#DISK&VEN_SONY& PROD_PRS-600&REV_1.00#0800461000D4D93E&0#{53F56307-B6BF-11D0-94F2-00A0C91EFB8B}#{53F5630D-B6BF-11D0-94F2-00A0C91EFB8B}',
'F:\\': u'\\\\?\\STORAGE#VOLUME#_??_USBSTOR#DISK&VEN_SONY& PROD_PRS-600_MS&REV_1.00#0800461000D4D93E&1#{53F56307-B6BF-11D0-94F2-00A0C91EFB8B}#{53F5630D-B6BF-11D0-94F2-00A0C91EFB8B}',
'H:\\': u'\\\\?\\STORAGE#VOLUME#_??_USBSTOR#DISK&VEN_SONY& PROD_PRS-600_LAUNCHER&REV_1.00#0800461000D4D93E&3#{53F56307-B6BF-11D0-94F2-00A0C91EFB8B}#{53F5630D-B6BF-11D0-94F2-00A0C91EFB8B}'}
Looking for ALEX
Looking for ANDROID
Looking for BLACKBERRY
Looking for BOOQ
Looking for BOOX
Looking for COOL_ER
Looking for CYBOOK
Looking for DBOOK
Looking for EB511
Looking for EB600
Looking for ECLICTO
Looking for EDGE
Looking for ELONEX
Looking for ESLICK
Looking for GER2
Looking for HANLINV3
Looking for HANLINV5
Looking for ILIAD
Looking for INVESBOOK
Looking for IREXDR1000
Looking for IREXDR800
Looking for IRIVER_STORY
Looking for ITALICA
Looking for JETBOOK
Looking for KINDLE
Looking for KINDLE2
Looking for KINDLE_DX
Looking for KOBO
Looking for N516
Looking for N770
Looking for N810
Looking for NOOK
Looking for NUUT2
Looking for PALMPRE
Looking for POCKETBOOK360
Looking for PRS500
Looking for PRS505
Looking for README
Looking for S60
Looking for SHINEBOOK
Looking for SNE
Looking for TECLAST_K3
Devices possibly connected: None

Thank you for any help.