Once you have registered on rev.ai, you can go to View Account and then recent Jobs ( https://www.rev.ai/jobs) . There is an UPLOAD button in the upper right hand corner. Click on that and traverse to find your file.
Results will appear in the Recent Jobs list (refreshing the browser helps the Completed to appear faster sometimes).
You can download in a variety of formats: TXT, JSON for transcriptions and SRT, VTT for captions. Download one at a time, as many as you'd like.