[Babul]

the filesystem has rebooted w/o "closing" the file. use a recovery tool to gain it back, if your lucky, you only will loose the recent changes. the most important: you must not write ANY data onto the partition, else you risc the data will be overwritten...
also you should make a complete backup of all your temporary stored data, maybe there is still a working file. use a filesearch with a string you know it IS for absolute sure inside the file, like "welcome th my gamamode". search all the files for containing that string then...