Export to mp3 in latest version-- where is it?

I have a score I've just completed. In addition to sending out parts to my band members, I also send out an mp3 of the arrangement so they can hear it. I used to do that by clicking file/export and then select mp3. In this new update, that's not there any more. I really use this feature a lot. I hope it's in another tab. Can anyone tell me where this is? Thanks.