Hi, I just downloaded v0.8.7 and Calibre will no longer recognize my Kobo

When I plug in my eReader, I get the following error message:
Error Communicating with Device
no such column: ___ExpirationStatus
Traceback (most recent call last):
File "site-packages\calibre\gui2\device.py", line 81, in run
File "site-packages\calibre\gui2\device.py", line 332, in _books
File "site-packages\calibre\devices\kobo\driver.py", line 213, in books
OperationalError: no such column: ___ExpirationStatus
Along the bottom of the window, however, after the version info, it does say "Connected to Kobo reader". Selecting the device tab just gives a blank screen, though.
Thanks so much for your time!