Issue what you described looks like doublet particle files, but if you couldn't even enter game, I don't think it's possible...I didn't see any duplicate Particles, so I opened the FH.txt and this is what it said:
So firstly, make sure you installed patch correctly (I know, you did it many times, but... just review it.) - https://feral-heart.com/smf/index.php?topic=68059.0
About particles - go into FH folder > media > particles and look are there any files ended with _0, _1, _2, etc. If there are, delete them and run game again.
If there aren't any double particles, I think you should open FH.log/FH.txt file inside main FH folder and tell here what it says.