This may help...In your MetaTrader software, there should be an icon on your upper toolbar that looks like a yellow caution sign with with an exclaimation mark in it (just to the left of the "Expert Advisors" icon that activates the EA). This takes you into MetaEditor (it's part of your MT4 platform). See top of picture attached here/below. Then once in MetaEditor, you can do a File drop-down-> Open and point it to the *.set file that you should have parked in the Presets folder (within the experts folder where you put the mq4 EA file).
With some EA's, you also have to right-click on the chart, select Expert Advisors off the pop-up menu -> Properties, then click on the Inputs tab then click on the Load button to the right and point it to the *.set file to apply the presets.