Kickstart is a sidechain compression plugin developed by Nicky Romero, a renowned DJ, producer, and remixer. This VST plugin allows you to create dynamic, balanced mixes with ease, by ducking one track under another. It's an essential tool for creating space in your mixes and making your kicks and basslines punch through.

Regarding "crack," it usually refers to a version of the software that has been modified to bypass its licensing or activation requirements. Using cracked software is illegal and can pose significant risks to your computer's security and your data. It's always best to purchase plugins directly from their official websites or authorized resellers to ensure you receive legitimate software, updates, and support.