We apologize for not adding this note when Valentina 11.4.5 was released.
The ValentinaDB file format changed in 11.4.5. Databases and projects created or modified in this version can be opened in Valentina Studio and Valentina ADK applications of version 11.4.5 or newer.
If you need to open and modify older files without any updating, you should use an older version of Valentina Studio. You can find these older versions in the Previous Releases directory.