updating from pro tools 8 to 8.0.5

hello. i'm new here and to pro tools. i'm running pro tools 8 on my mac book pro OS X. one of the free digidesign plug-ins that comes with 8 is called Structure Free. every time i tried using this plug-in, the interface came up all yellow and "glitchy", for lack of a better way of describing it. i read a number of forums and found that i was not the only one with this problem. the advice given was to install the pro tools 8 LE updater which i did. i installed update 8.0.5. now when i try to open pro tools i get a message saying "unable to locate digidesign hardware, make sure all cables are plugged." all of my cables are plugged in properly and this is not a problem i was having before i installed the update.

please help!!