Best of all is the support. It's super quick and the tech team bend over backwards to help you - particularly if you are a novice!
Actually you can set the splashimage to wherever you want, but you HAD to keep the trailing slash, just like in the given example (defaultvalue).
But I see that's a common pitfall: So I updated the module.
In the current version / from now on, this is done automatically by the module, if necessary ;-)
Just update your module -> problem solved.