Bring it on!
I too, am amazed at the quibbles of people complaining about the "cost" of this upgrade. I now have both versions on my phone, and happily paid $3.00 for the new version, and another $3.00 for all of the upgrades. ($6.00 and done until new features come) Creating an app like this deserves payback. Its a bargain for people who love stargazing and frolicking among the stars. (Simulations are certainly the only way I will be able to do it.)
tsmdav about
Star Walk 2: Stars and Planets, v2.1.3