The was released by Native Instruments in 2002. At the time, hardware FM synths were seen as cold, brittle, and nearly impossible to program. The Yamaha DX7, while iconic, had a user interface that resembled a programmable calculator—not a creative instrument.
Dexed is an open-source, 6-operator FM synth that is heavily inspired by the DX7. It can load DX7 SysEx files just like the FM7. It is ugly compared to NI’s design, but it sounds incredible and it is . This is the safest "FM7 download" alternative. Native Instruments Fm7 Download
If you want the sound and functionality of FM7, you have two legitimate, safe, and superior options: The was released by Native Instruments in 2002
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