Because it is no longer supported, it lacks modern encryption and security patches. It is highly recommended to use it only for viewing old records, not for active business accounting. 🔄 Why Most People Look for Tally 4.5
Tally ERP 9 (and TallyPrime) includes a built-in data migration tool for old formats, including Tally 4.5. Download Tally 4.5
Technically, it is abandonware. Most archival sites offer it for free. However, commercial use without a license from the era is legally grey. Because it is no longer supported, it lacks