I am guessing they gutted the tool set so that you couldn't ruin your main install, until they rig it so that you can't. Unfortunately till then, there is no way to access the main assets.
Why they didn't simply say so before they teased everyone with an early tool set (oh the irony) that they wouldn't have been able to use, is beyond me.
They could have saved themselves a whole lot of negative sentiment had they managed expectations.
Perhaps that had something to do with fulfilling the rest of their list of Kickstarter goals, on release, at all cost. It was bad enough they had to scrap the NPC schedules. Better to release a half gutted non-functional tool than none at all.
I realize this may sound like a complaint, but its not. I expected this.
I really love the game and want to see it make Larian a ton of cash. They deserve it.