the file that all the saved data for the game was deleted, and there was no backups :(

I would recommend you get a github account and learn the following commands:

git clone

git pull

git push

git commit -am 

I commit my changes after each session.

Yeah, I would second learning some form of source control, GitHub is my go-to.  You can make private repositories if you don't want your work public, but either way, you have a place to back up your work and work on different versions.  It's also great for collaboration.  Sorry to hear you lost your work though, it happens to the best of us.