You can install Events Tracker for Elementor with two kind ways.
Install from plugins directory
Go to Plugins > Add New and Search for Events Tracker for Elementor. Click Install Now:

After installation is finished, click Activate:

That’s it. You’re ready to use Events Tracker for Elementor.
Installation from zip
Download Events Tracker for Elementor from WordPress repository:

Go to Plugins > Add New and click Upload Plugin. Then choose plugin archive or just drag archive to the Choose file button. Press Install Now:

Press Activate Plugin to start use the plugin:

You’re now ready to use Events Tracker for Elementor. See other plugin tutorials to learn how to use all features.