Ok, if the issue is still there after a clean install, 'tis not a faulty file and ye did fine. What I meant on the replacing files is that one of the mods may 'ave had a file connected to an important game-running file which would need to be replaced in order f'er the mod to work, but that's no longer in question.
Before I start the next possible way to fix this, check y'er particle folder f'er any copies of files. If ye see any ending in an underscore and number, delete them.
Search y'er computer f'er any and all FH files and delete them. If there are files ye really want to keep, put them on a USB and hold on to them until after ye reinstall FH. Make sure to download a new installer, just to be sure that ye don't get any faulty files installed as the original installer ye've got may be broken.