Just delete the shader folders? Or something else?

Hi Bonchie, that's a good start (and what LM recommends).

 

I just bought a new video card, but my performance is still the same, what gives?
Your shaders (think rendering code your graphics card uses) is compiled upon first load, or the first time you do something in Prepar3D v2. That's why you can see hiccups the first time you do something, but they then go away. Because the shaders are compiled now. If you change your graphics card, you still have your old shaders for your old graphics card. Go delete your Shaders folder in "%programdata%\Lockheed Martin\Prepar3D v2" and then start Prepar3D back up and let your shaders get recompiled for your new card. That should certainly help.

 

When I pick up a video card, I usually also re-install the latest drivers (as micro code and video bios updates are sometimes included for the hardware).