I couldn’t find a specific product or sample library called “Ilya Efimov Nylon Guitar” in major retail libraries (Ilya Efimov is known for Acoustic Guitar, Nylon Guitar, Fingerpicking, Strum, etc.). It’s likely you mean Ilya Efimov Nylon Guitar (or one of his nylon-string libraries).
Open Kontakt and use the "Files" browser to locate and load the .nki file. Final Thoughts
The library is built on a deep sampling engine to provide a high level of expressive realism.
Map an expression pedal to modulate velocity in real-time for breathtaking solo lines.
High Realism: Includes 14 velocity layers per note and 3,477 samples.
Massive Sample Set: Over 3,400 samples recorded at 24-bit/44.1 kHz.
If you are looking for a cracked version: Stop. Cracked VSTs often contain keyloggers that steal your DAW licenses and banking details. Furthermore, Ilya Efimov has abandoned copy protection measures in the past for honest users; do not reward their trust with theft.
Here is everything you need to know about downloading and using this library.