I noticed the trainer is listed as updated Feb 2nd now so I figured there may have been an update. Thought i'd download and check it out. A very quick run through shows the power slots still don't work:
Here's a screenshot of what resulted from spam adding system slots to the weapons with the trainer and then powering them with it. Despite showing them all powered, I am unable to provide power to the first weapon that only requires 2 bars of power. In addition, i'm also unable to provide power to them any other way and have to restart the game.
I saw the same thing happen and was baffled. Maybe this is with the instant weapon recharge on?