Reinstalling it usually does not work, but for anybody else with the same problem, this is what went wrong for him. Search for the AdvancedHook file. (I believe its AdvancedHookV.dll), and delete it, then, go to the ELS site, press download, and this time, click the AdvancedHookV download, put this into the main directory of GTAV and your done. Most people usually just download the actual main thing, along with the included AdvancedHookV. The file included with the actual ELS download does not work, so you can download it (as a separate download), on the same exact page.