If you want to avoid the web installer, here are three reliable methods to get the full package.
BlueStacks X (also known as BlueStacks 10) is fundamentally a cloud-based gaming platform, which makes the concept of a traditional "offline installer" different from previous versions. Unlike BlueStacks 5, which is designed for local emulation, BlueStacks X focuses on AI-based Hybrid Cloud technology to stream games or run them locally. The Core Difference: BlueStacks X vs. BlueStacks 5
Because BlueStacks updates frequently, the best way to get the specific Offline Installer is through the official archives.