FORScan is not entirely free. It operates on a freemium model. The free version gives you a (typically 2 months) that unlocks all features. After that trial expires, you need a paid license to continue accessing advanced functions like:
Master Guide to the FORScan License Key: Unlocking Pro Features forscan license key
Tip: If the file downloads with a .csv extension, rename it to end in .key so the software can recognize it. FORScan is not entirely free