Warning
This operation (Importing data from lazer to stable) is not officially supported by osu!, so use this at your own risk and don't forget to backup your data before downgrading!
A very simple and tiny program that converts osu! (lazer) collection data to osu! (stable) collection.db format.
Note
You should already know where your osu! installations are located and what you are trying to do.
CollectionDowngrader.exe <path to osu! (lazer) client.realm> <output osu! (stable) collection.db path>
This command reads the collection data from osu! (lazer) at the default installation path and creates a collection.db that can be used in osu! (stable).
CollectionDowngrader.exe %APPDATA%/osu/client.realm collection.dbWarning
If you already have some collections in your osu! (stable) installation, then you should NEVER directly overwrite the existing collection.db with a new one. Instead, use CollectionManager for merging data in multiple collection databases.
Just utilize your IDEs.
- kabiiQ/BeatmapExporter: Inspiration of this project, all code for osu! (lazer) realm schema and the database parsing.
- Piotrekol/CollectionManager: Code for creating osu! (stable) collection.db files.