So, being a beta tester for FastRawViewer, I decided to kill two birds with one stone; try out the upcoming version, and try and see the problem you're having.
Looking at your first RAW image, I decided to adjust the brightness further by 1 and 2/3 of a stop (EV), and this is what I got:
Looking at this, not only is the shot not blown out, it's underexposed. As you can see from looking at the RAW histogram and data, after I added in 1.67 EV, you only have 193 pixels blown out, so that's perfectly fine. So, I took a look at your JPEG, and this was the result:
Looking at the JPEG histogram, it definitely looks like you underexposed a bit, and that's why you have plugged shadows.
The second shot is different. Here's what the RAW looks like:
Here, I would have exposed a bit hotter; you are allowed to blow out about 0.3% in the strongest channel (here being the green). This would help with some of the plugged shadows and shadow noise.
The JPEG looks pretty good as well. I'd look at your RAW converter settings, because I think that's where your problem may lie. If that doesn't work, contact the developers because they're your best source for dealing with this bug.