The 'Data Downloader' is accessible through multiple sections of the Trendlyne website, including directly from the homepage. 

To find it on the homepage, hover over the 'Markets' tab and select 'Data Downloader' under the 'Tools' section in the dropdown menu, as shown below.

Alternatively, you can access the ‘Data Downloader’ from the Screeners, Portfolio, or Watchlist sections.

Any selected Screener, Portfolio, or Watchlist will have a ‘Download’ or ‘Export’ option. Click on it to see ‘Data Downloader’ in the drop-down menu.