The fix I found for this error was in the AppData folder. There is 2 or 3 files left in there probably from when the game crashes then you try to restart it causes a conflict with the launcher searching for files.
To fix this issue you need to be able to see appdata file this file is default hidden from sight but you can change this in control panle to view all folders. This file is usually located in users/"your name"/appdata/local/temp/and will be lable something like WER bla bla bla delet these files and you should be ok to launch the game agian.
Another way to get to the user/appdata if you cant find it cause its hidden and you dont know how to unhide go to start->and in the run field type %appdata% and then select the roaming file that will open up the user app data folder just back up out of roaming file and go to temp i hope this helps if anyone gets this issue.