The game was working perfectly until yesterday when i was playing and received an error message, now every time i launch the game or try to load any of my saves, this error pops up and I can’t play. Please help, I really enjoy playing your game 
error: http://i.imgur.com/PuIi1D2.jpg
Assuming that you haven’t used a save editor, can you send us your save files to support@greenheartgames.com so we can investigate this further?
Just send us the file _file__0.localstorage contained in the Local Storage folder.
Location of the containing folder:
On Windows:
C:/Users/YOURUSER/Appdata/Local/Game Dev Tycoon/Local Storage/
where YOURUSER is your Windows user name.