I need help exporting the L4D2 models and materials - GCFscape and VPKextractor Don't work

Problem:

GCFscape - Cannot find any GCFs from L4D2/Doesn’t register VPKs

VPKextractor - Gets about a second into it and becomes unresponsive, yet closes within an instant of me clicking the red X at the top of the box.

I might be doing something wrong but can somebody help me with this, please?

In your L4D directory, look in the .pak files, you might find the files.

I’ve already tried that.

You’re opening pak01_dir.vpk in C:\Program Files\Steam\steamapps\common\left 4 dead 2\left4dead2 right?