What I know or have tried that is relevant:
1) Windows sees my device (Kindle 3rd Gen). Its current drive letter is F:
2) Calibre "notified" me through the system tray- "Amazon Kindle Detected"
3) In the initial view of the Library, the lower left corner says; "Calibre version 0.8.12 created by Kovid Goyal
-- Connected Amazon Kindle"
4) The "On Device" Column is showing with checks by the books that are on my device
5) I can even run a report with Kindle Collections to get the # of books & collections on my Kindle.
BUT... I do not have the "Device Icon" that is supposed to auto appear in the main Calibre toolbar. Thus I can not see the books on my device through Calibre, nor can I choose books to import to Calibre (along with many other things that "all important icon" allows me to do). Can someone please help me? BTW, I have restarted Calibre, the computer, & the Kindle one or more times. *Below is the info from the "debug device detection" I would appreciate any help. My vacation time is almost up & I am desperately trying to finish getting all my books imported into Calibre.

Version: 0.8.12
USB devices on system:
[u'usb\\root_hub&vid8086&pid2935&rev0003',
u'usb\\root_hub&vid8086&pid2939&rev0003',
u'usb\\root_hub&vid8086&pid2936&rev0003',
u'usb\\root_hub&vid8086&pid2938&rev0003',
u'usb\\root_hub&vid8086&pid2937&rev0003',
u'usb\\root_hub&vid8086&pid2934&rev0003',
u'usb\\root_hub20&vid8086&pid293a&rev0003',
u'usb\\root_hub20&vid8086&pid293c&rev0003',
u'usb\\vid_1949&pid_0004&rev_0100']
Drives detected:
(0) F:\ ~ \\?\STORAGE#VOLUME#_??_USBSTOR#DISK&VEN_KINDLE&PRO D_INTERNAL_STORAGE&REV_0100#B008A0A003950E23&0#{53 F56307-B6BF-11D0-94F2-00A0C91EFB8B}#{53F5630D-B6BF-11D0-94F2-00A0C91EFB8B}
Available plugins: ADAM ALEX ALURATEK_COLOR ANDROID ARCHOS7O AVANT AZBOOKA BAMBOOK
BLACKBERRY BOEYE_BDX BOEYE_BEX BOOQ BOOX COBY COOL_ER CYBOOK DBOOK E52
E71X EB511 EB600 EBK52 ECLICTO EDGE EEEREADER ELONEX ESLICK
FOLDER_DEVICE_FOR_CONFIG GEMEI GER2 HANLINV3 HANLINV5 ILIAD INVESBOOK
IPAPYRUS IREXDR1000 IREXDR800 IRIVER_STORY ITALICA ITUNES JETBOOK
JETBOOK_MINI KINDLE KINDLE2 KINDLE_DX KOBO LIBREAIR LUMIREAD MENTOR
MIBUK MOOVYBOOK N516 N770 N810 NEWSMY NEXTBOOK NOOK NOOK_COLOR NUUT2
ORIZON PALMPRE PDNOVEL PDNOVEL_KOBO PICO POCKETBOOK301 POCKETBOOK360
POCKETBOOK360P POCKETBOOK602 POCKETBOOK701 PRS505 README S60 SHINEBOOK
SNE SOVOS SPECTRA STASH SUNSTECH_EB700 SWEEX TECLAST_K3 THEBOOK
TREKSTOR USER_DEFINED VELOCITYMICRO WEXLER
Looking for devices...
u'usb\\vid_1949&pid_0004&rev_0100'
Detected possible device KINDLE2
Devices possibly connected: Kindle 2/3 Device Interface,
Trying to open Kindle 2/3 Device Interface ... OK
Main memory: 'F:\\'
Total space: (3279044608L, 0, 0)
P.S. If you see my registration date, then the # of posts- it will give you an idea of just how desperate I am feeling. Most of the time I just look up info.