Can I make changes to a blender file and have them show up in unity?

I am working on a simple game with my nephews, and as a starter have created a character with 3 animations and got it up and running in unity. The game development is going well and I have added many more animations to the blender file as well as improved the existing ones. I have tried re-importing the character model [by right clicking/re-import] and while it does some loading and such it doesn’t really seem to make any changes - my new animations are not there. I have imported the blender file without doing an export thinking that it would make importing animations easier.

I can reimport the blender file however I think I would have to re associate all the animations with the actions. Is there any way around this?

This should definitely work. Are you sure you’re editing the same file that you added to your Unity project? When you import the asset into Unity it makes a new copy of it, stored inside your project folder. If you edit that version - either by finding the actual file, or just double clicking it in your Unity project - and save it, when you switch back to Unity it will detect the change and automatically re-import.