I've increased the memory allocation for the "Control Panel"
rem Start Aware IM Control Panel
start %JAVA_HOME%\bin\javaw -Xms512m -Xmx1024m -XX:MaxPermSize=512m -cp %CLASSPATH% com.bas.controlcenter.ControlCenterApp
in the "startAwareIM.bat".
But when I look to the System Settings GUI, the value of the "Aware IM Server" did't change.
So I think I'm sill missing the Aware IM Server property somewhere. The Installation manual of 5.9 doesn't mention this.