Low framerate does make it awkward to double-click. You may be able to get it to work by doucle-clicking very slowly. I've discovered that I get a much better framerate with a larger resolution, and windowed. Fullscreen mode gives me a very low frame rate. My best results are with 1280x1024 Windowed.
BCF3 mixes 2D techniques over a 3D viewport, which causes things to run quite slowly. Filax, it might not be as big a task as you'd think to adapt your GUI to use 3D quads. The results should be substantially faster. Have you looked into this at all?
BCF3 mixes 2D techniques over a 3D viewport, which causes things to run quite slowly. Filax, it might not be as big a task as you'd think to adapt your GUI to use 3D quads. The results should be substantially faster. Have you looked into this at all?