first you download the programs from the fx preset packs, make sure the ones you download are compatible with your fx software.
after you download them, open up fxlab pro and choose a blank timeline.
there is a small icon below the pictures on the right hand side. it says "FX preset" beside that is a scroll button. click on it and below a "Import fx preset pack" option will apear click that and find your presets that you downloaded and click on them.
this should do it. if you have more questions or need it explained differently let me know.