I was trying to update the software on my D-Link DIR-615 router and downloaded the update from the D-Link support page. It downloaded a .bin file. By referencing the Support site I was eventually able to figure out how to update my router's software. Unfortunately, at the time I downloaded it I did not know I was not supposed to open the .bin file. So, when I double clicked on the .bin file and nothing happened, I stupidly designated a program change under "Properties" and changed it to have the program "Notepad" open the .bin file. I have subsequently figured out how to use the .bin file to update my software. My problem now is that because I changed the .bin file to open using Notepad, no matter how I try I can't change it back to a .bin file. This includes deleting it and downloading it again from the Support page; every time I download it, it still shows up as a Notepad file and not a .bin file. I hope you understand my problem and can help. Thank you.