I notice you're asking about "Native Instruments B4 Free Download." I want to provide some important context:
Would you like recommendations for safe, legal organ VSTs instead? Native Instruments B4 Free Download
was a popular virtual Hammond B3 organ emulator, but it has been discontinued for many years (replaced by Vintage Organs in Kontakt). It is no longer sold or supported by Native Instruments. I notice you're asking about "Native Instruments B4