Change file settings in ongoing GS project

Hello

I've got a project (published on GroupShare) with a file entirely translated.

Now I need to handle the review in two steps: 1) Review the ppt without comments 2) Review the comments.

How can I change the file settings accordingly?

I've tried to update the file (but no settings available) and to change the settings in the project settings (closing and opening the target again) but there's still the entire translation and not the ppt without comments only. Adding a new file without comments would be my plan B, but it's tricky with GroupShare (new file = double project statistics in the end, problems when depublishing/publishing a project)...

Thanks for your advice.

Aurélie