Opening a test that was created in TS Plugin 2012 and edited in TS Plugin 2013 causes the entire test to be erased. 

Steps for repro

1.Create New Test Studio Project in VS 2012
2.Import test created in TS 2012
3.Change Description of coded step
4.Save (at this point the tstest file's encoding changes from UTF-8 to ANSI. This is expected)
5.Quit VS
6.Open the project in VS
7.The test that you were working in is now empty. This can be verified by checking the contents of the tstest file in an editor

What is causing the test steps to be erased?