VMWare: File not Found, on Mac OS 10.10 Yosemite

I'm having trouble opening VMWare on my Mac pro OS 10.10. I didn't do anything, moving its files or anything. I just turned my Mac off before I went to bed last night, and then this morning, when I tried to open VMWare again on my Mac, it keeps giving me this waring:

File not found.

I'm very confused, I've important files storing on my Windows workspace and need to have it restored.

What I've tried:

I've uninstalled VMWare on my machine, and re-downloaded and reinstalled it back, but, no luck, still the same warning. VMWare doesn't open at all.
I've also restarted my machine, hoping that something magic can happen, but unexpectedly, no luck.

Solution

OK, question resolved after I went to the Tech Stop at my University. We just found that Windows 7 was somehow gone in my VMWare, then we opened Virtual Machine Library of VMWare, then re-installed Win7 into this VMWare, as this picture shows: http://postimg.org/image/blnk4x59z/ Now things are working fine.

Some other people might run into the same issue in the future, I don't know why this happened and nobody really knows what's going on. I called VMWare tech support, but they don't provide any help since I downloaded it for free from our CS department website. But our department tech assistance has never met this issue. So nobody to turn to.

But anyway, pretty simple to fix: Just re-install win7 in your VMWare, if you run into the same case as I did, by opening your Virtual Machine Library.