I had seen a thread about this same topic before... however it didn't work for me. I didn't copy the link, but this is what I copied from it:

"Today I started up LW and the window appeared but there was nothing on it, the main window was all white and the 'upgrade to pro' window was just grey. Restarted my comp a few times didn't fix it

Solution i used:

LW had worked for me before so i knew it should be working,the only thing i had changed is in my video options for windows.
i have a ATI x800

right click on desktop- > properties - > Settings tab - >advanced button - > 3D ati tab -> direct 3D - > custom button

i had just switched the check boxes lables 'appplications prefference' for AA and anisotropic from checked to unchecked because of a game i was playing and set them to 4x AA and 8x Ansi. Then later i started LW and got the blank screens, so i changed the boxes back to 'application prefference' checked and LW started normally"

I got up to the point of clicking the advanced button under the settings... however when I got to clicking 3D ati tab, there was no 3D ati tab! All the tabs that were there were: Color Management, Intel(R) Extreme Graphics 2, General, Adapter, Monitor, and troubleshoot. Can I got some help? (I use a Windows XP)

Thanks!