Excluding Portfolio category?? (within this example)

Hi everyone,

This is my first post. I am in no way experienced in wordpress development. In fact my experience doesn’t go further then occasional “hacking” to modify a purchased template for my own use.

Now I did happen to purchase a nice template. It has the “portfolio” section. I have been creating several categories for my portfolio items and I am now trying to show all of them except 1 category.

I have contacted the developer but he seems very uninterested in helping out and dodging my emails by 1 sentence explanation like : our template allows showing only 1 category at a time or all of them at once.

I find it hard to believe, but if that’s the case I’ll admit the defeat.

I have been reading about term-id, category exclusion, custom query loops and what not. I simply cant get my head around it. Could someone experienced please guide me what I have to do within the below code. (hope that is enough?)

[Code moderated as per the Forum Rules. Please use the pastebin]