Just download Lumion 3 Pro setup and install it after installation simply download and run patch for Lumion and press Patch button on it. It will automaticlly patch the program and registry and will make it to full version with enabling all its premium content and features with models of pro version. This patch support 3.x version thats mean you can patch latest version which is 3.0.2 Remember don't launch Lumion after installation just run the patch as Administrator. If your antivirus gives warning about patch then...  File is Clean and its a false positive.
Lumion 3.x
Lumion 3 Patch Released