problem for translating with captionhub

Hey, I am a translation student, and right now for a project I would like to translate subtitles for TED talks videos and the subtitling tool TED uses is captionhub. It looks pretty easy to handle, but I have an issue : on the right next to the transcripted text from the video, there should be an empty column where I can translate. Somehow, this column isn't showing on my computer screen, and I can't just remove the transcripted text to write my translation instead, because my translation has to be reviewed by someone once I'm done and it wouldn't be convenient either as I could forget the transcription while I am starting to translate.

If anyone is familiar with captionhub and/or has encountered a similar problem before, I would really appreciate any advice as I really would like to start translating but I am stuck.