Einrichtung von Discourse in meinem Windows 10 nicht möglich

[Falco]

Upload it on that page from your last screenshot and click on the “> Restore” button on the row where it appears.

We have docs about this procedure on

Create, download, and restore a backup of your Discourse database

Discourse allows site administrators to create and download a copy of the site’s database. The backup can then be uploaded and restored to any Discourse forum. Discourse backups include the full site database, which contains everything on the site: topics, posts, users, groups, settings, themes, etc. Depending on how the backup file is created, it may or may not include uploads. See the next section for details. Though the data created by plugins exist in the database, the plugins themselves…