thanks for enjoying SketchFX! There's a conflict with some other softwares using the Ruby dll. In this case, it's a Toshiba Utility application giving the error. I guess that after the error you're still able to use SketchFX, right? We're working on the issue, but in the meantime you can get rid of the error by not running the Toshiba application (in case you don't need it).