I have a similiar situation as yours. The first thing I did was on the slide in question, go to the Transition Tab, on the far right you will see "Advance Slide" and the "On Mouse Click" is checked by default, uncheck it.
Then if you need to Pause and Resume you will need to use macros for that function. I use that a LOT for my presentations for my students. I dont have the script at the moment, but if you do a search here you may find it.
Hope this was usefull
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