If you decide to go the legal route (trial or paid), here is how to properly install 1001Bit Pro on SketchUp 2021 to avoid extension conflicts.

Step 1: Close SketchUp completely. Step 2: Download the official RBZ file from ExtrudeAndSeek. Step 3: Open SketchUp 2021. Step 4: Navigate to Window > Extension Manager. Step 5: Click the "Install Extension" button (bottom left). Step 6: Locate your downloaded 1001bit_pro_v2.1.rbz file. Step 7: Click "Yes" to all prompts. Step 8: Restart SketchUp. Step 9: You will see the 1001Bit Pro toolbar. Enter your license key or click "Start Trial."

Note: If you had previously installed a "repack," you must first delete all leftover files from C:\Users\[YourName]\AppData\Roaming\SketchUp\SketchUp 2021\SketchUp\Plugins\ to prevent crashes.


The keyword "repack" is the red flag here. In the software piracy ecosystem, a repack is a modified installer created by a third-party cracking group. Typically, a repack includes:

You do not need to risk a repack. There are legitimate ways to get 1001Bit Pro functionality for SketchUp 2021 without paying the full price.

The plugin organizes its tools into logical categories, streamlining the workflow for architectural modeling: