Visit https://mem.ai/settings/exports and export your notes using JSON format.

You'll receive an email titled "Your exported mems" - click the "Download exported mems" button.

This will open a new tab on a page starting with https://storage.googleapis.com/ - copy the full URL of the page. This is the value you will use in step 5.

In Amplenote, press cmd+O on mac or ctrl+O on Windows/Linux to open the quick nav dialog, then type "import from mem" and select this plugin.

In the popup window, paste the full URL from step 3.