um.dll is a standard DLL from the game; I don't know what kind of repack would prevent it from appearing. The original game should produce the exact same error. And what are you running as administrator?
You need to launch it through the launcher so that at least something works, and not directly through the game's EXE! It will copy the necessary files itself.
All the necessary EXE files are initially located in \FLauncher\bin\. This is done so that it can first create a backup of your original EXE files, in case you need to uninstall the mod. Do you think the installation wizard creates a desktop shortcut for no reason? )

I don't create repacks together with the game for a simple reason - I don't use pirated versions at all. I can't even be bothered to look for where to download them. On the other hand, I can provide a Steam rip, which doesn't require anything and runs just like that. But I just don't understand - how can you play a game for 10 years on a pirated version... Oh well, the Russian soul is prone to getting things for free.