Windows permission error after 1.9.0 library update

So I installed 1.8.0 on my windows 8 machine. It told me that three libraries were out of date: DS1307RTC, Adafruit_LED_Backpack, and Time. I updated the first two through the IDE.

Anyways, next time I try to compile I get the error:

open D:\Development\Arduino\libraries\Adafruit_LED_Backpack\library.properties: Access is denied.

Error compiling for board Arduino Leonardo.

Normally, not a problem, but the Adafruit_LED_Backpack directory has no owner and no one has read permissions, and nothing I have tried (even as Administrator user) will let me take ownership, change permissions, read, delete, move or do anything other to touch the directory, much less its contents.

I have been searching for every resource I can find for dealing with this sort of problem, but none of the suggested solutions work.