The latest release of opentoonz/opentoonz is v1.8.0. OpenToonz is open-source 2D animation production software released by DWANGO, and the repository description introduces it as a fully featured tool for professional production. However, the provided materials contain nothing newly added or changed in this version. Therefore the specific changes in v1.8.0 cannot be confirmed, and this post does not present any particular feature improvement or fix as an achievement of the release.
OpenToonz is built on Toonz, created by Digital Video in Italy. The README explains that it is based on Toonz Studio Ghibli Version, which Studio Ghibli worked on over a long production process. This shows the lineage of software connected to commercial animation production. The implementation language is C++, and within the scope supported by the repository description and the README, OpenToonz can be seen as an open-source production tool and 2D animation software aimed at professional production.
The README points only to opentoonz.github.io and this repository as the official distribution sources. Therefore, from these materials alone, installers from other paths cannot be confirmed as official releases. The repository's license field is marked NOASSERTION, so a specific license is hard to confirm from the information provided. Since the changes in this release are also absent from the materials, the official distribution sources and license information must be checked separately in order to judge version-by-version improvements or usage conditions.