You crashed reset the router and now it's asking for a firmware upload.
Go to http://support.dlink.com/products/revision.asp?productId=DIR-615 ,and select the proper version of your router.
Step 1: Download the latest firmware
Step 2: Once you´ve downloaded the firmware, open a web browser such as Internet Explorer and enter the IP address of your router (192.168.0.1).
Step 3: Click on the Browse button and browse to the .bin (or .dlf) file you downloaded
Step 4: Click Send and then the router will upload the firmware.