My advice is: for the love of God, look at the ContentExamples download. How did I not see before? It is level after level of stuff that Epic have done for you.
Look at it and learn.
1 hour ago i had my test project become unopenable for some unknown reason, when i open it - editor crushes with error. And is not 1st time.
So my advice is:
Always make dayly backups of your important UE4 projects
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Always make daily backups of your important UE4 projects
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Better yet, add your project into SVN or Perforce. Then you can have it set a time to auto save any and all changes.
I personally use Visual SVN Server paired with TortoiseSVN (and AnkhSvn for Visual ), They work great, and I have used them for a long time so for me it is easier than Perforce.
Then while the VisualSvn server is running, you can push a commit automatically (recommended), as well as manually if you need to at any time. 
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Better yet, add your project into SVN or Perforce. Then you can have it set a time to auto save any and all changes.
I personally use Visual SVN Server paired with TortoiseSVN (and AnkhSvn for Visual ), They work great, and I have used them for a long time so for me it is easier than Perforce.
Then while the VisualSvn server is running, you can push a commit automatically (recommended), as well as manually if you need to at any time.
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y, very nice append
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