Remove CMYK icc tags in a PDF

I got Pitstop Pro 12 and I would like to create an Action List that removes all CMYK ICC tags on images and graphics in a PDF. I want to keep RGB tags.

I've been trying to use 'Select by color space' but it doesn't work for all objects. Can someone please give me a hand?

Here is my testfile, if you would like to give it a try:
https://www.dropbox.com/s/opibsbwhp8...e.pdf.zip?dl=0

Thanks!