the program crashed and i lost my work that I been working for many hours. How can can some ones tell me if is been saving some where please
Fritzing is auto-saving a version of your sketch every 10 minutes by default. When you re-open your sketch it should ask you if you want to recover one of the auto-saved versions.
If not, these might still exist in your app data folder, something like C:\Users\username\AppData\Roaming\Fritzing on Windows.