There is code in JREInfo.isValid() that is specific to JDK9:
                platform.compareTo("1.6") >=0 &&
                platform.compareTo("9") <= 0 &&
This implements the requirement that for deployment in JDK9, only jres of the 1.6.0, 1.7.0, 1.8.0 and 9 families are valid.
For JDK10 this should be:
                platform.compareTo("1.7") >=0 &&
                platform.compareTo("10") <= 0 &&
ie: only 1.7.0, 1.8.0, JDK9, and JDk10 are valid.

Secondly, there is code in JfxRuntime.runtimeForJRE():
        } else if (product.startsWith("9")) {
            version = noDash(product);
            path = null; // no javafx.jar in JDK9
        }
this needs to be:
        } else if (product.startsWith("9") || product.startsWith("10")) {
            version = noDash(product);
            path = null; // no javafx.jar in JDK9
        }
or we will think there is no JFX in JDk10.