Automatically via Community Plugins

In Obsidian:

1. Open Settings > Community plugins
2. Make sure Safe mode is off
3. Click Browse community plugins
4. Search for "Query All the Things"
5. Click Install

Once installed, close the community plugins window and activate the newly installed plugin

NOTE

If you want to use the dataview integration please make sure it is installed. Without it the dataview_pages, dataview_tasks and dataview_lists tables will be empty.

Manually

Copy the main.js, style.css and manifest.json file from the latest release on sytone/obsidian-queryallthethings: to a folder called qatt in the plugins directory.