Scratch

Ah, accepting the loss for more than 300 scripts is pretty difficult to accept. Well that's depressing. But I can't deny that it was my own fault. Thank you though for your kind reply, I doubt this is fixable, I only tried to believe that it was.

henley wrote:

Sounds to me like the file may be damaged.

As a result, Scratch could not read the project.

That's not obvious... 

Anyways, it seems like it cant be fixed, by your description, but I can identify it for you.

It could be result of..

Bit Rot
Bit rot, also known as bit decay, data rot, or data decay, is a colloquial computing term used to describe either a gradual decay of storage media or the degradation of a software program over time. The latter use of the term implies that software can wear out or rust like a physical tool. More commonly, bit rot refers to the decay of physical storage media. Bit rot is often defined as the event in which the small electric charge of a bit in memory disperses, possibly altering program code.
or
Hardware failure
Background radiation, head crashes, and aging or wear of the storage device.

Note: I am trying REEEALY hard not to make a (macs are bad, get a PC joke) but I'll refrain.