I had Photoshop CS5 installed on my previous Macbook which is now broken, however a friend of mine was able to copy it on to an external hard drive for me. I have now purchased a new Macbook, copied and installed Photoshop on to it from the external, however when I try to open it, 'Error: 6' appears, it states: 'Configuration error. Please uninstall and reinstall the product. if this problem still occurs, please contact Adobe technical support for help, and mention the error code shown at the bottom of this screen.' How do I fix this problem? Thank you in advance.