A couple of users have reported that their images will not import when Validate Images is checked.  

To temporarily fix the issue, uncheck "Validate Images". 

We are investigating the problem, but since it has only happened on a couple of computers, we believe it is something on those local computers that is blocking the functionality, such as anti-virus.

If this happens to you, please reply below and list any anti-virus type programs that you are currently running.