HELP with Storyline trigger controls

If you use a trigger to disable the object possessing the trigger, it will work (see the attached sample), but only after the first click. The first click executes all the triggers attached to that object, including the one to disable it. Then next time it is clicked, no action will result because it has been disabled.

I'm not real clear on what you want to accomplish, but here are some suggestions for disabling an object's triggers. (Disabled state leaves the object visible, but its triggers are not executed if it is clicked. Hidden, on the other hand, makes it both disabled and invisible.)  These are listed in the order of my personal preference.

You can set its initial state. (In the sample, the enable button has an initial state set to Selected.) 

You can change its state to disabled when the timeline starts.

You can change its state in response to an action, either by the learner, or the timeline. (In the sample, clicking the Disable button will disable it, while the Enable button will re-enable it.)

You can cover it with a transparent shape, and remove the shape in response to an action (either by the learner, or the timeline).