The free version is limited to 50MB of data or 1 year, you should find the limitation on the product page explanation.
The product page explains how to download free data and how to convert it to cTrader.
https://clickalgo.com/historical-data-market
The only benefit of this tool is to provide additional years of data above what the cTrader broker can provide.
Many brokers already offer US100 data, why would you need to buy it?