Welcome on board...
You did not write any useful details about your installation, so I can only guess:
pslaunch was slightly buggy from version 0.5.2.x, so it is recommendable to download and install the new complete installer version 0.5.3.
If you already did so, then your issue with art/pslaunch.zip is rather new; you could try to answer "No" when you are asked to update next time you start pslaunch, and try to run a "Repair" then.
Unfortunately, crashes in game are not really as rare as we wished. One possible temporary solution might be to delete the file "shadercache" in your personal Application Data folder once (unfortunately you did not tell us which operating system you have, so we can't tell you yet where exactly you can find it, it depends on the OS). But there are still many more bugs to be fixed.
Also it is always useful to know your hardware, at least: CPU (number of cores, speed), GPU (chipset, model), RAM (amount).