Started successfully with jre1.6.0_05 x64 including 3D view. There is problem in combination of newer Java versions (maybe because of some d2d changes in Java 6 u10), DirectX and graphic card driver.

1. Download and install jre-6u5-windows-x64.exe
2. Go to Program Files/java/jre1.6.0_05
3. Copy and overwrite directories bin and lib from the java installation folder to Sweet Home 3D/jre8 directory
4. Start SH3D