Download Win4K4 and Win4K3 Suite
Win4K4Suite: This download works ONLY on the Elecraft K4 radio. Version 1.380
You must have firmware Beta release R31 or later. Note: If you already have Win4K4, download the 64 bit update. That will preserve your settings. The 32 bit can be used as a second instance with completely different settings.
Win4K3Suite: These downloads work ONLY on the Elecraft K3, KX3 and KX2 radios. Version 2.080