Correct. As with the Saab, the DC3 will get a free compatibility update to make sure it can run in XP11, along with fixing any existing issues. This update will only allow the XP10 version to work in XP11, so we can say it is officially supported. This update will NOT have any new mesh or PBR textures.
The paid update will be for XP11 only and will feature optimized mesh, in many cases, brand new mesh, more code and full PBR textures. By full, I mean the entire aircraft is being re-textured from scratch, with all appropriate PBR texture maps. All current owners of the DC3 will receive a substantial discount on the XP11 PBR updated version.