If you want to make sure your system stays safe while modding, let me know: What are you trying to mod? Did your antivirus flag a specific error or threat name ?
:
A high-difficulty mod that redesigns the final battle.
This was perhaps the most infamous error for the original ModInstaller. It was typically caused by the installer being an older version that had been broken by a game update. The solution was to delete the old installer and download a fresh, updated copy from a trusted source like the Hollow Knight Discord server. radiance.host mods modinstaller.exe
on PC. While it was the community standard for several years, it is now considered and has largely been replaced by modern tools like Scarab or Lumafly . Current Status & Compatibility
, this installer was the gold standard for adding features like health bars, custom knight skins, and debug tools. Discord Roots
When in doubt, refer to the pinned comments in the channel of the official Hollow Knight Discord server. The community maintains up-to-date information on safe tools and practices. If you want to make sure your system
If you executed this file, you might not notice anything immediately because modern malware tries to remain stealthy. However, you should look out for these critical warning signs:
: Provides extra health and mask shards for a more accessible experience.
Safe modding communities use trusted platforms like CurseForge, Nexus Mods, Modrinth, or official GitHub repositories. Domains ending in obscure TLDs (like .host , .xyz , .top , .cc ) are frequently used for disposable malware campaigns. This was perhaps the most infamous error for
If verified safe, add the installer or your game directory to your antivirus "Exclusions" list so it can run without interruption. Managing Game Updates and Compatibility
| Problem | Symptom | Typical Solution | | :--- | :--- | :--- | | Installer Won't Open | The .exe does nothing, or creates a file like AU.exe but stops. | This was often a version mismatch with the game. Users had to switch Hollow Knight to an older beta branch on Steam (e.g., 1.4.3.2) via Properties > BETAS . | | "Unable to download mod list" | The installer gives an error message when trying to fetch mods. | This indicated the installer was outdated. The fix was to delete the old installer, re-download it from the official Discord or GitHub, and run it fresh. | | Link Not Working | The radiance.host domain fails to load. | In later years, the original domain became unreliable. Users reported a new address, radiance.synthagen.net , as an alternative source. |
You can enable or disable mods within the installer without uninstalling them. 4. Running the Game
Ultimate Guide to Hollow Knight Modding: Using radiance.host mods modinstaller.exe
Whenever possible, source your modifications from vetted, curated communities with strict moderation policies, user reviews, and open-source code repositories (such as Nexus Mods, CurseForge, or GitHub). What to Do If You Suspect a Infection