Under what option should i upload a revised main document when using manuscriptcentral?
It should probably be "Main document". The reason it says "- with author details" is probably because, as you said, your article has already been accepted. So, the label "Main document - with author details" probably means that you should now add your author information; you should no longer hide it as you were probably required to do in the double-blind peer review stage.

I'm not absolutely certain, but based on the details you provided, that seems to be the most likely option.