After v0.12, apps installed via `create-nocobase-app` no longer have a `packages/app` directory, and code customized in `packages/app` needs to be moved to the custom plugin.
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## Upgrading
After v0.12, upgrading the application can be done by running the `yarn nocobase upgrade` command.
If there are problems with upgrading, you can also [recreate new app](/welcome/getting-started/installation/create-nocobase-app) and refer to the old version of .env to change the environment variables. The database information needs to be configured correctly. When using a SQLite database, you need to copy the database files to the `./storage/db/` directory. Finally, run `yarn nocobase upgrade` to upgrade.