1001bit Pro remains one of the most powerful architectural toolsets for SketchUp 2021. It drastically reduces modeling time for standard building elements. To ensure a secure and stable workflow, it is highly recommended to download the official version directly from the developer rather than risking a compromised "repack."
The 1001bit Pro toolbar should appear immediately. If not, go to > Toolbars and check "1001bit Pro." Why SketchUp 2021?
To ensure your SketchUp 2021 environment remains stable and secure, you should always obtain the plugin through legitimate channels: SketchUp Extension Warehouse: