If I briefly go through the things that usually seem to go wrong for people at this early stage of route building maybe one of them will help you out.
It's hard to see from your earlier screenshots, but it appears that you want to be somewhere near the Aichision Waterfowl Refuge. Is that right?
Could you check to make sure that you've got your Google Earth set up for Decimal Degrees? Under Tools/Preferences there's a series of radio buttons and as you've recently got a different version of GE it's possible that it's defaulted to an incorrect setting.
The other thing I'd look at now is to check that in RWDecal you've gone into Preferences/Set Route Starting Latitude and Longitude. This should give you a list of loads of routes, and of course you select the route you're working on from here.
Of course if you've had to make any changes then you'll need to knock up a new set of decals to test whether it's worked or not.
If you get a chance to have a read through this following thread you'll see that the OP had a very similar problem to you.
http://forums.uktrainsim.com/viewtopic.php?f=304&t=125820&start=0&st=0&sk=t&sd=a&hilit=decimalGood luck. I'm sure you'll let us know how you get on.