Sony, one of the biggest proponents of the Blu-ray format, announced that it is ending production of all Blu-ray disc media.

If you cannot eject the external hard drive safely or the ... Under the section of All disk drives, select the disk drive that is causing you the issue. Select OK and then click on Apply ...

So this is a C++/Win32 application that automatically detects your DVD/CD drives on start up, will auto-launch makemkv when a disk is inserted and eject the disk when done...hence the autmation part.