Hi Edmund,
First, make sure you have downloaded the latest version 11.2.4 or 11.2.6 depending on your DB.
Then try under the Adjust tab:
1) white balance your reference frame
2) choose Product for Curve, then adjust brightness if needed
3) choose Product 4 for Color (look)
4) under Grain, if your exposures were long, check the box and adjust grain a bit to reduce some noise
5) keep sharpening off, I sharpen later in photoshop with a low radius around .3 and a hgher amount 250-350% on a layer set to luminosity.
You will get good results this way.
I have used Raw Developer for the last few years and it is powerful.
However, LC11.2 is very much improved and I'm liking it much better.