The magic of Ilya Efimov libraries lies in the scripting (the code that tells the guitar how to behave when you press a key). Cracking software often involves modifying these scripts.
This is widely considered the "king" of free guitar VSTs. It is a stripped-down version of their Martin acoustic guitar library.
For around $10–$20, you can often find simpler guitar instruments on platforms like Spitfish Audio that are fully legal and sound great for demoing songs.
If the price tag of the Total Bundle is too high right now, do not steal it. There are ethical and free ways to get great guitar sounds today:
Repacking groups often bundle installers with extra "surprises."
If you own Komplete Start (the free version of Komplete), you get access to the Guitar Rig 6 Player.