When I click ,,upload it'' it says successfully updated or sth like that but a bit up it says choose file to upload. I am a bit confused.

No, no. it uploaded. it always just says that :P

If it plays ingame just fine, then nothing is broken. If it doesn't, you can just go in the games files and delete your folder, go back ingame and wait, after that, it should be able.

It doesn't work

If you can't hear any sounds at all, then it's your effects volume in the settings. Otherwise, if it says successful update and it doesn't play, there's something wrong with your end and not Toribash.