Thanks for the update!
I'd like to share some feedback about the Linux 1.3 version:
- Deleted Rippers remain visible on the texture atlas.
- For seamless textures, it would help to have another preview mode that clearly shows UV seams. It's difficult to judge using only the blurred edges.
- Every new Ripper is created in the center of the texture atlas instead of the current camera view, so I have to drag it across the entire atlas every time.
- If two Rippers have points very close together (for example, on a cube UV unwrap), dragging one point sometimes moves the other Ripper's point instead of only the selected one.