I have found this to be true also. What I have found you have to do is remove the admin. programmer using Add/Remove software from control panel then if you are using windows 7 you have to go to Computer/Users/name of computer/AppData/Roaming/ESI then delete the folder the Admin. programmer resides in. Re-install the admin programmer. When you configure your New Site DON'T NAME IT, leave it's name as New Site. I have found that if you don't name it you won't get the Unhandled Exception error. This has got to be a bug that ESI just hasn't had time to fix.