Selector is component responsible for selecting next targets. You can check if it is running by executing ps -A|grep selector. If the reply is not empty, e.g. you will receive:
user@host:~$ ps -A|grep selector
19126 pts/7 00:00:00 rts2-selector
then selector is running. If you would like to work directly with the executor, you shall proceed with following instructions to disable it.
press key down/key up until you reach SEL component. Please note that SEL is usual name. If you are unsure about selector name, please consult /etc/rts2/services or ps -Af|grep selector)
press tab key (tabulator, usually located on upper left corner of your keyboard) to switch to the adjacent area on the right
press key down to reach sel_enable entry
press enter key to bring up a popup menu
press key down to change true to false
You can see screencast of this action in this screencast.