Preserve: transforms

Case:
Multiple linked files on artboard. Default Placement option for all files is Preserve: Transforms.
I need to change them for Preserve:File Dimension but must do it file by file,
because after selecting all linked files Placement options are greyed out
and not avaiable for multi use .

It would be nice to improve it by letting change Placement options for multi selected files.

I need to change 30000 of them clicking one by one right now. So any help (or bypass idea) to solve this problem will be greatly appreciated.