Corrupted downloads are rare these days, but you never know... We'll have to wait for s7rikeback to respond back about if I am looking at the correct numbers here:
14/05/2020 @ 19:40
100_FalloftheRisingSun_UltimateEdition_v1.1a_EN
Size = 1.41 GB
Current MD5 checksum value:
acb087157983e6de6b8413ac064810f5
I am not sure if that matches the upload on the SubSim server or not... But - what usually happens is that the base game gets corrupted. You might be best off making a new set-up of the game. If you have a known-good archive copy of the game, that is the way to go. Make a new "install" folder, copy the archive in and expand it, build the MODS folder, create a new MultiSH4 Save folder, activate the mod and Patch, put LAA on SH4.exe, and start a new career. Like I say though, be sure your video stream matches from end to end. You might have to mess with High DPI and Run as administrator, maybe even Windows 7 compatibility, all dependent upon the OS.