Where osx 10.10 notification center settings are stored
Solution 1:
The database has moved on Yosemite. The following command takes to you to its new location:
cd `getconf DARWIN_USER_DIR`/com.apple.notificationcenter/db
Solution 2:
FYI, the location has moved. It is now:
cd `getconf DARWIN_USER_DIR`/com.apple.notificationcenter/db2