1. Go to https://github.com/vzhd1701/enex2notion/releases/latest
  2. Download bin_enex2notion_*_win_x64.zip
  1. Extract bin_enex2notion_*_win_x64.zip
  1. Put your *.enex files in the same directory where you extracted bin_enex2notion_*_win_x64.zip
  2. Open context menu (Right Mouse Button) while holding Shift key
  3. Select Open PowerShell window here command
  1. Enter .\\enex2notion.exe --help in the PowerShell window to see available options
  1. Enter .\\enex2notion.exe --token YOUR_TOKEN_HERE notebook.enex to upload notebook.enex

See this article on how to get the token for your Notion account.

For a complete manual on available commands, please refer to the repository page.