You'll normally have to contact Big Fish Games support about that. This forum only supports games sold direct by Last Day at Work, not those sold via game portals, who typically add their own copy protection or other code to the game.

However, by 'File 1' do you mean the savegame file - named 'Isola21' or similar? On occasion a save fails for some reason, especially if the game doesn't close down normally. That's the reason for the backup savegame files (Isola221 or whatever), which you can rename and use instead of the lost file. See the FAQ.