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2 Base package

ModAPI v1
deprecated
Version 1.0.5 (build 20190218)
ModAPI v2 Version ModAPI v2.0.9623 (2026-09-19)
  • timeline
    ModAPI v1 Changelog
    ModAPI v2 Changelog

    GitHub Repository

    **v2.0.9623 Summary of Major Changes**

    **â–  New Features**
    1. ModAPI Self-Update Function
    • Check for and install the latest version using the "Update" button in the Settings tab.
    • After downloading, the changelog is displayed first; the application restarts only after clicking "Done."
    • Verified normal operation through direct testing of the entire process.

    2. Redesigned Initial Launch Screen
    • Removed the prompts for "Steam Integration" and "Maintain Version Table"—these were redundant as they can be toggled anytime in the Settings tab.
    • Added a scrollable area displaying "What's New in This Version" instead.
    • This screen can be reopened at any time via the button in the Welcome tab.

    3. Added ON/OFF Tooltips for Four Checkboxes
    • Added explanatory tooltips (On/Off status) for "Steam Integration," "Developer Logs," "Reset Logs," and "Always on Top."

    **â–  Updates (Improvements)**
    1. "Maintain Version Table" Option
    • Now disabled if the game path is missing; a tooltip explains the reason.
    • Renamed the label from "Keep Latest Version" to "Maintain Version Table" to avoid confusion with the Update button.
    • Refined the explanatory text for clarity and briefly explained its necessity.

    2. "Steam Integration" Usability
    • Automatically detects and populates the Steam installation path when enabled (supports installations on different drives).

    3. Game Launch Notifications
    • Removed the confirmation popup that appeared every time for unsigned games (e.g., *Green Hell*).
    • Actual file corruption or tampering continues to be blocked as before.
    • Added a verification flowchart to the README.

    4. Theme System Cleanup (Classic ↔ Fluent Integration)
    • Conducted a comprehensive comparison of control layouts between the Classic theme and the nine Fluent themes. • Added sliders and multilingual input fields to all nine themes (managed centrally via a shared style file).
    • Added list separators (GridSplitter) to the Classic theme as well.
    • Standardized the appearance of disabled buttons so they appear dimmed.

    5. Updated Welcome Popup Text
    • Rewrote the summary text to align with the release notes (managed manually; not automatically synced).

    **â–  Fixes (Bugs)**
    • Fixed an issue where the Classic theme lacked a tooltip design, causing it to display the default white style.
    • Resolved text wrapping and truncation issues across various popups.
    • Fixed bugs related to welcome popup window sizes across different themes.
    • Fixed an issue where text was invisible in the Classic theme's welcome popup.
    • Fixed a bug where the reset button remained active even when the Steam connection was enabled.
    • Removed the empty space appearing before the scrollbar, which was caused by the fixed width of the summary text.
    • Preserved "dead code" as comments instead of deleting it.
    • Cleaned up two unused leftover files.

  • info_outline We do not support cracked games.
  • info_outline Do not overwrite your existing v1 installation with v2.

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4 Download your package

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Download

Downloading YUMI...

1 Your download is ready!

Extract the .zip file to
C:/Program Files (x86)/
Or choose another location. Do not extract it inside the Steam game folder.

2 Start YUMI.exe and follow the installation steps.

3 Select the game path
(e.g. Steamkeyboard_arrow_rightSteamAppskeyboard_arrow_rightcommonkeyboard_arrow_rightSons Of The Forest)

4 Start the game through Steam

If you later add mods, just restart YUMI and it will automatically install them.

FAQ

Download

Downloading ModAPI...

1 Your download is ready!

Extract the .zip file to
C:/Program Files (x86)/
Or choose another location. Do not extract it inside the Steam game folder.

2 Start ModAPI.exe

3 Enable mods

4 Start the game

You can launch your game regularly through Steam without ModAPI after the first launch.

FAQ