I have a board with 4 layers. The two inner layers are a power and a ground plane. I had no other option then to route two traces on the power plane. Now, I find out that the power plane has two gerbers files. - Unit001 - +3V3 (Power Plane) => full copper - Unit001 - +3V3 (Power Plane Positive) => showing the two traces Is it possible to to combine these two? I see no option in plotting and printing to do so.
Ignore the Power Plane setting for the inner layers, i.e. remove the Bias=Power Plane in Design Tech Layers setting. Treat them as ordinary layers like the Top/Bottom Layers. Route your tracks on the inner layers, then flood the Inner Layers with Power and Ground nets. Then re-generate your Gerbers as normal and you won't have 2 "Power Plane" gerbers anymore.