SubLab uses by default openGL as a way to draw the interface.
Older graphics cards (for example Nvidia geforce 9500 GT) and some on-board Intel graphics chips in Windows laptops (such as Mobile intel 4 Series Express) can have trouble using the newer openGL that SubLab uses.
If you are experiencing a blank interface like in the image below, the first thing to do is update your graphics card drivers. You can do this by checking your graphics card and then visiting the manufacturers site and updating the drivers.
If after updating you are still experiencing the blank interface, then all is not lost! We've a new beta version of SubLab that allows you to disable openGL altogether.
To get the beta, just open up a support request stating your OS and that you have updated the graphics drivers for your card and that you are still experiencing the blank interface. We'll then send you the link to the beta.
Once you have downloaded and installed the beta, navigate to the folder ../FAW/SubLab and open the file settings.xml in a text editor. You should see something similar to the image below.
Next, on the line "opengl_disabled" change val="0" to val="1" like below
Finally save the file and then launch SubLab, you should now be able to see the interface as normal, no more blank interface!