Select the installation path for FAB 3000 which is our recommend Gerber Viewer for EasyGerb. It is completely compatible with EasyGerb, and there is a button provided on the Finish dialog which allows automatic viewing of Gerber and Drill files created from EasyGerb.
Note: Usually EasyGerb will automatically find FAB 3000 if it is already installed on your computer. The default installation path for FAB 3000 is "C:\Program Files\Numerical Innovations\Fab3000\Fab3000.exe"