You don’t say whether you’re using the online or offline version of Twine, so I’m going to assume you’re using the offline version, since that’s the version I know best.
It’s odd that you can’t import that file into Twine. Are you getting an error message or anything? Does the file look correct if you open it up in a browser or a text editor?
Regardless, you should be able to import the last save from
My Documents\Twine\Stories. Do you see the file there?
Next place to check, assuming you’ve hit “Play” in Twine to open your game recently, is your
Temp directory (typically in
C:\Users\YourUserName\AppData\Local\Temp) for any HTML files, since that’s where they get launched from. Look for the most recent
.html file there which is your game, and then import that into Twine.
After that, check the most recent
My Documents\Twine\Backups\(date) folder. You should only use this if it’s more recent than the most recent file in your
Then, if you’ve either a published an HTML version of your game or you’ve made an archive of your Twine files more recently than either of the above, then you should import that.
If none of that works for you, then you might need to post a link to that HTML file, and we can see if we can figure out why it’s not letting you import it into Twine.
Generally speaking though, this is why it’s important to back up your work frequently. Any time I make a major change to any of my stories, I “publish” them to an HTML file, and back them up in my Google Drive. Additionally, I periodically make an “archive” of all of my games, using the “Archive” button in the main Twine window, and back that up as well. That way, even if my computer dies, I still have access to those files.
Also, using the Git version-control system is probably overkill for what you need. A simple offline backup system should do what you need, as long as you update it regularly. I think Dropbox even has a tool which can do that for you automatically.
Hope that helps!