I had very little success importing ABC/LTB files into Blender 4.2 or even Blender 5. This also is not really a Blender "plugin", strictly speaking. It is its own application that can write blend files.
Creating this took a considerable amount of time, so I decided to charge a bit for it. If you are happy with the tools that are available for free, then this is great and no need to buy this program :)