I'll work on putting an installer together to insure that every thing needed is installed,up to date and in it's right place.
You can change the GCode text normally in "Function CFG's"/Fonts, possible later this will be available in a Flash screen, you can also change the toolpath colors in "Config"/Toolpath.
I believe where at a point with the Flash screens to start pulling everything together and making it rock solid now.
John S, What type of OS,Computer,ext.. your running and as much of what you think could be happening.
I have found that CPU and RAM usage drastically drop's when using swf files.