Framerate cut in half when running by clicking jar vs command line or netbeans

The framerate on my game drops from 16-19 to 10 when I run it from a jar by double-clicking. Running it from the same jar by command prompt or from the project itself in the IDE gives me the higher framerate.

I’m using LWJGL, but I’ve found posts about this problem both elsewhere and here by people not using OpenGL. No solutions that I noticed though.

Any ideas?