Main class absence in 4.0.0

[BrainyLark]

No problem using the 3.8.3 so far (with some exceptions popping up), but building the 4.0.0 there appeared an error saying I have:

no main manifest attribute, in pddl4j-4.0.0.jar

So I checked the 3.8.3 build file and found "fr.uga.pddl4j.planners.statespace.StateSpacePlannerFactory" to be your main class and found no correspondence in /src/ from the 4.0.0 to specify as its main class counterpart.

Is there something I am missing?