I'm playing the Hellpoint demo, and at some point I ran across some kind of workbench area where you could upgrade your weapons. But at the time I had nothing to upgrade. Right now I'm at the boss section, but I can't remember how to get back to the workbench area. Does anyone know where it is?

I'm at Port Issoudun.

I figured it out. It's in the basement area. You have to find the stairs by the the lit runway.