1. You can use the USB-UIRT without clicking the configure button, just bind the functions to remote buttons you want and it will work. The girder plugin doesn't like to play nice with StreetDeck and we have to write our own plugin to get it to work any better.
2. OBDII will work with anything there is a plugin for. There is only a plugin for ELM based devices. Just select the plugin and set a COM port in the settings and it should work.