FPS stuck at about 24, regardless of level size etc.?

Hi guys. The question pretty much sums it up. I’ve tested the starter levels as well as my own levels of different scales and the fps remains the same. My system specs are pretty high so there’s no way they could be causing this (16 GB Ram, GTX 1070 graphics card…) Also, this is how its been since I started using the software and I don’t have any background applications that could be affecting performance.

Can anyone please help?