Does anyone ever use the Equations 3.0 thing is Word?

I tried to save my 2 FUCKING HOURS of work and it says it's fucking corrupted and now I can't do anything with it, won't open and there are no temp files anywhere on my computer. I've googled everywhere and nada.

Error message is that "there is problems with the content" then gives me a line that the problem is on, but HELLO I CAN'T EDIT THE FUCKING THING.

When I open it in notepad it's a bunch of symbols so this is just lovely.

I hope one of you guys can help.