Ok, I used the Process Monitor method to find the right playlist.
https://www.youtube.com/watch?v=AlhBmIbReao&list=WL
Seemed to work, except it did not give a proper result. The monitor showed list 700. However, when looking in the playlists, 700 did not appear. So, I looked in the loading log in makemkv. I found this;
Title 00700.mpls is equal to title 00451.mpls and was skipped
So, I went to 451, and that is only 1.5G. Thats obviously bloody wrong.
Please advise.