While users often search for a "fixed" free download, it is important to understand the official licensing structure:

: To create a basic hip roof, select a face and run the tool; to create a gable, select one or more specific edges before running the tool. Safe Alternatives

Instant Roof Plugin for SketchUp: A Guide to Streamlined Roofing

While Trimble (owner of SketchUp) rarely sues individual users, distributing cracked plugins violates the DMCA. Forum moderators on Sketchucation will ban you permanently for asking for cracks.