Hi, the picture shows opening a single example code file and not an entire project so I can only comment on that. The file seems to have loaded but the tab looks strange, can you float the "ArduinoreadSerial.ino" tab to see if this is a size issue with your vs windows? 

Vs can sometimes get confused with its UI and has a "Reset" option however I have never needed to use it. If floating the tab doesn't show the code then we will look at that.

To test opening a project you need to close the empty solution "File>Close Solution", then open an example by clicking the example name shown in Blue

When you click the blue example name you will be prompted to "Copy/Clone or Open", select the copy option then you can hack an example without loosing the original (your choice)

So without a solution open what happens when you open a project/sketch/example?

Hi, yes pre-requisites are on the codeplex download documentation tab, a little hidden away. 

We need a complete re-vamp of download site and documentation

Glad its sorted and thanks for the picture, it will help others