Change the arrow on association in UML-designer Eclipse plugin

I'm using the latest uml-designer with Eclipse NEON.2. Any time I create association between classes it adds the direction arrow. I can change the diamonds from the properties window. However, the only way I found to change the arrow is by going into the Properties->Style->TargetArrow field. It works, but seems a bit hacky. Is there a more direct way of doing that?

Here you are just changing the style of the select association, you do not modify the semantic element. It fou want to set that an association is non navigable then you need to select the association and go to the the Properties View -> General tab -> Member End property and uncheck the Navigable checkbox in the table.