Adding New Animation To Old Character

I have been recently trying out blender and I created a character. The animations I made with it were basic movements. Now that I have everything in unity done, I want to add some more animations. The problem is when I export them from blender, they come in a new character file. This means I’m not able to add the animation. Is there any way I can fix this so I can use my animation?

Fixed. I overwrote the file.