I don't know what directory you want to exclude.

Make a try, do it !

If something go wrong :

"cd /home/user/.config/tracker/"
"cp tracker.cfg.ORIG tracker.cfg"
"cd /home/user/.cache/tracker"
"rm -f *.db"
reboot the phone, wait for tracker made the index and you go back in previous state, so you will don't break your phone. I have done the things 5 times since my first post and everything is fine. Imageviewer and Mediaplayer don"t index all my "Windows Only Stuff, Temporary file" now.

Beware with the rm, do it in the good directory and only delete *.db, not all the file.

If you want exclue MyDocs/Images add $HOME/MyDocs/Images

Images and .Images are not the same directory !
case is sensitive.
I dont't know whats happen if the same directory is in WatchList and NotWatchList.

Last thing : Always keep the file tracker.ORIG so you can always restore the original configuration.