the new version doesn't have any device specific changes.
That screenshot shows your reader is connected and should be detected. Try the following at the green prompt
Code:
import wmi, pythoncom
pythoncom.CoInitialize()
_wmi = wmi.WMI()
from calibre.devices.scanner import DeviceScanner
from calibre.devices.prs505.driver import PRS505
d = DeviceScanner(_wmi)
d.scan()
print d.devices
d.is_device_connected(PRS505)