The current release is more than three years old, so the extension has languished somewhat. There are several issues in the outstanding implementation (such as a buggy contact search capability) and the design is fairly dated.
I would seek to work with the current extension to:
- First, identify and fix existing issues and bugs;
- Then, improve the design to modernise it and make it more attractive;
- And finally, implement new features such as contribution management
with the goal of releasing an updated version which is more user-friendly and more capable than the current one.