If you're asking this question then I would recommend you flash it in fastboot. If the phrase "fastboot flash recovery recovery.img" doesn't make total sense to you then you really should read up on it before you do much of anything else from within recovery.
^^^^ What he said. Curious, how did you install it the first time? There is also a twrp app and flashify app that will flash img. files as long as you are rooted.
Flashing recoveries is one of the most basic things we do here. If you don't know, or can't find out how to do that, then you should study up.... Before you end up with a paperweight.
Not trying to offend you, just saying this to help. ?
Try the "complete moto X guide" at the top of the general section. And bookmark it. Almost anything you need to know is there.