It's a fun place, but you're ready for change. I think the wide dining room stripes are in conflict with the more narrow shiplap, so that's a place to start. If I were going to do more shiplap, I'd do it in the dining room, not the yellow room. You could take it all the way up to the division between the lower and upper parts of your windows, Top it with a plate rail, and then add a nice pop of color at the top, like the cherry red from the chairs. Start a collection of plates to put on the rail. If one of those two DR walls is wide enough for the china cabinet to stand against it, I would reverse the two pieces there so nothing has to be cornered. Unless you're really tired of it, I think the yellow could stay for a while. Think about slipcovering the sofa and chairs in the cream color from the buffalo check chair, and get a new rug and pillows to change the vibe.

It's really hard to tell. On my monitor, the walls look golden yellow in the first pic, beige-pink in the second and taupe in the third. I would choose an off-white color that works with your floor.

To get any help other than GreenDesigns you would need to post some pics so people have some idea of what your home looks like.

We are in this process, doing room by room, we have wood casement windows also, my husband re-did the moldings with a bit larger thicker molding, which we painted white ourselves and installed. But, we left one of the rooms moldings along the floor in place and sanded, because we had upgraded it to thicker when we put wood flooring in that room, so it was stained to match. So we sanded it a bit, primed and painted it while it stayed on the wall, that was more trouble than it was worth and when you get down near it, you can tell, it’s not as smooth and nice and I was very careful to do it right. In my opinion, you are better off replacing it than trying to paint it.