Installing OTA on rooted XT1064

My wife's XT1064 has on OTA (22.46.12.en.US) available which is a Stagefright fix. It has downloaded but when it tries to apply the OTA it boots into TWRP and I have no frigging clue where the downloaded file is or if it can be applied through TWRP.

Any help would be greatly appreciated as I am unfamiliar with the Moto G's ins and outs.

Thanks.