KFG file

i wanted to view my keyboard KFG file
but i accidently turned the file into a rar file...
how do i change back to my kfg file?

i'm really stupid...
someone help me...

Usually you can just click on the filename (or right click and select Rename, that might be easier) and change the file extension back.

this is a noobie question...
how do you change the file extension back?

How did you change it in the first place? It should be a simple click on the filename after selecting it, as long as you don't have the "Hide extensions for known file types" option selected for your explorer windows. If you actually compressed the file into a RAR archive, then you need to extract it using winrar.