Presets are not applying to photos and not showing preview

[Morgan3230085894yw]

Help! I just downloaded the most recent version of Lightroom Classis (not web based) on my computer and now the presets section is not working at all. When I hover over the preset it shows nothing on the image, when I click on it or double click on it it still does nothing. I have tried to import a preset I bought and this will not work or show the differnt variations in the pull down menu of the pack when I click on that preset pack. I have tried to uninstall and reinstall, I have rebooted my computer I have restored all presets to original and still nothing. I have no idea what is going on! and in the middle of the busiest season of the year.......... 

[DdeGannes]

@Morgan3230085894yw , You stated "I just downloaded the most recent version of Lightroom Classis (not web based) on my computer and now the presets section is not working at all."

Please indicate the actual numeric version number you have installed. In addition provide full details of what you are attempting to do.