Corrumpt Sampler File -- any way to fix it??

Hi. A file was working fine, then Sampler crashed, and now it won't load. Backups of the file won't load either.

I've tried it on a mac, and have even put it on my PC and tried there, and both will crash when the file is loaded.  It's big, but not nearly the biggest I have. Problem is, it has like...dozens of textures I've been working on, and it'll be a very  big pain in the bum if I have to recreate them (not to mention, I won't be able to recreate them as they are now).

How can I go about fixing this file? ANy known ways?

Very very scary to think that any file could just go corrupt 😞