ModTek succeeds but doesn't decorate main menu or appear to be loaded

Running BT 1.9.1 latest on M1 ARM Mac.

```
(base) robo@robombpro ModTek % mono ModTekInjector.exe
ModTek Injector
---------------

ModTek already injected. Would you like to re-inject: Assembly-CSharp.dll.orig restored to Assembly-CSharp.dll
Injecting Assembly-CSharp.dll with ModTek.Injection.LoadModTek at BattleTech.Main.Start
Writing back to Assembly-CSharp.dll...
Injection complete!
```

Injector appears to work but no decoration and unable to load mods. It appears to be a vanilla mod loader and errors with ERROR No existing mods found.

Checked shasum on dll and it does appear different than the original. I've tried modtek 0.7, 2.0 but have yet to try newer versions.

Start by reproducing the reported M1 ARM Mac path with mono ModTekInjector.exe and inspect the injector output around ModTek.Injection.LoadModTek at BattleTech.Main.Start. Compare the resulting Assembly-CSharp.dll with the original and check why the loader reports "ERROR No existing mods found." Done means ModTek decorates the main menu and loads an installed mod.

Written by the indexing model from the issue text.