Here is the question
On the back of the broken panel you see a recovery manual. You need to find the emergency repair key in order to put the robot into
autoboot mode, but it appears to be ciphered using a Caesar cipher.
You can get the manual in the above link or you can download it here https://drive.google.com/file/d/0BxDZABox5hT2cWNacWw3RU85RzA/edit?usp=sharing
In the question they have specified that the file ( here recovery manual ) is ciphered using a Caesar cipher.
One may not be knowing about what cipher is here are some links which tell you the basics.
http://listverse.com/2012/03/13/10-codes-and-ciphers/ ( In this Ceaser cipher is 6 th one )
I think that you understood what a caesar cipher is, In this computer world you need not sit trying all the keys possible from A-Z instead you could use an online decoder for this purpose . The one which i used is http://www.xarg.org/tools/caesar-cipher/
Here you just paste the given text in the file to the box to encrypt just keep the key as guess and the magic happens.
here is screenshot.
As a hint they provided a good video . You can see it at http://vimeo.com/64387487