I double click mudfish icon but the program is not starting. This only happen today.I reinstalled and it still not working.
ps: I just noticed it also freezes my desktop. (can’t left click or right click.)
Sorry for this issue. 
I’d roll-backed the release to v5.1.2 due to this issue. So please test it again after downgrading your mudfish version to v5.1.2 which found at https://mudfish.net/download link.
I got it to work by starting it from start menu instead of desktop shortcut. Just wanted to let you know 