All you need to do is make one simple pared down Runtime folder and load that instead of your existing one. For example, 1) make a Runtime folder consisting of NOTHING more than a downloaded freebie item. They already (in most cases) have a Runtime setup. 2) Start Poser. Load the new Runtime and disconnect your existing Runtime. 3) Restart Poser. IF it works successfully, your existing RT is the problem (probably). If NOT, reconnect your existing RT as per usual.