Data Locations

Data Locations

This page is the definitive map of every folder, file, mutex, scheduled task, and registry key that Sucrose touches on disk. Sucrose keeps user data, settings, cache, and logs separate from the installed binaries: configuration lives in the Roaming profile under %AppData%\Sucrose\, while the program files (and the bundled private .NET runtime) live in the Local profile under %LocalAppData%\Sucrose\. There is no monolithic config file and no app-specific registry usage for settings — the registry writes are limited to Windows' own DirectX GPU-preference key (at runtime) and the per-user Uninstall entry written by the Sucrose.Bundle installer under HKCU\Software\Microsoft\Windows\CurrentVersion\Uninstall\Sucrose (DisplayName, UninstallString, QuietUninstallString, DisplayVersion, InstallLocation, Publisher, NoModify, NoRepair, etc.) (see Windows-owned state).

Contents

• The two roots
• Roaming data tree (%AppData%\Sucrose)
• Local install tree (%LocalAppData%\Sucrose)
• Settings files
• Log files
• Important file names
• Process executable names
• Single-instance mutex names
• Windows-owned state (not in the JSON files)
• Quick lookup table

The two roots

Root	Path	Contents
Roaming (Environment.SpecialFolder.ApplicationData)	%AppData%\Sucrose\	Settings (Setting\), logs (Log\), cache (Cache\), wallpaper library (Library\), Showcase assets (Showcase\)
Local (Environment.SpecialFolder.LocalApplicationData)	%LocalAppData%\Sucrose\	Installed binaries, per-process subfolders, and the bundled private .NET runtime (Sucrose.Runtime)

The app name segment Sucrose comes from the constant Sucrose.Memory.Manage.Readonly.General.AppName. Folder-name segments such as Setting, Log, and Cache come from Sucrose.Memory.Manage.Readonly.Folder.

Roaming data tree (%AppData%\Sucrose)

%AppData%\Sucrose\
├── Setting\                         <Category>.json   (all settings)
├── Log\                             <Process>-yy.MM.dd.log
├── Library\                         default installed-wallpaper library (overridable via Library.Location)
├── Showcase\                        showcase / preview assets
└── Cache\
    ├── Bundle\                      update download cache (Sucrose.Update)
    ├── Store\                       in-app Store cache:
    │   ├── Store.json               store catalog snapshot
    │   ├── Pattern.json             store pattern data
    │   ├── <Category>\<wallpaper>   downloaded Store themes
    │   └── Temporary\               Store download temp; also the GIF download cache
    ├── Report\                      crash reports: <Id>.json  (Watchdog / Reportdog)
    ├── Properties\                  per-wallpaper saved property values
    ├── Gif\                         Vexana GIF engine cache
    ├── MpvPlayer\                   MpvPlayer engine profile/data + SucroseProperties.json
    ├── CefSharp\                    CefSharp engine cache + SucroseProperties.json
    └── WebView2\                    WebView2 user-data folder + SucroseProperties.json

Key roaming locations:

Folder	Purpose
%AppData%\Sucrose\Setting\	Every settings JSON file (one per category). See Settings-Persistence.
%AppData%\Sucrose\Log\	Per-process date-stamped log files. See Logs-Diagnostics.
%AppData%\Sucrose\Library\	The default wallpaper library. The active location is whatever Library.Location points to; it can be relocated (see Managing-Library).
%AppData%\Sucrose\Showcase\	Showcase / preview assets bundled with the app.
%AppData%\Sucrose\Cache\	All transient data. See Cache-Management.

📷 Screenshot needed: Windows File Explorer at %AppData%\Sucrose with the Setting, Log, Cache, Library, and Showcase folders expanded one level.

Local install tree (%LocalAppData%\Sucrose)

The installer (the Sucrose.Bundle package) extracts per-user into %LocalAppData%\Sucrose — no administrator rights are required. From Sucrose.Undo.Manage.Internal:

Item	Path	Notes
Install root	%LocalAppData%\Sucrose	Each executable lives at <Name>\<Name>.exe.
Private runtime	%LocalAppData%\Sucrose\Sucrose.Runtime	The bundled, trimmed .NET 10 runtime, so no system-wide .NET install is needed. See System-Requirements.
Data dir (removed on uninstall)	%AppData%\Sucrose	The Roaming tree above.
Uninstall registry root (read)	Software\Microsoft\Windows\CurrentVersion\Uninstall	The uninstall entry is read from the per-user (HKCU) Uninstall key. See Uninstalling-Sucrose.
Start Menu shortcut	…\Programs\Sucrose Wallpaper Engine.lnk
Desktop shortcut	Sucrose Wallpaper Engine.lnk
Self-delete batch	%TEMP%\del_<guid>.bat	Dropped by Sucrose.Undo during uninstall to delete the running uninstaller. See Undo-Internals.

Settings files

All settings JSON files live under %AppData%\Sucrose\Setting\. Each is a small JSON object of the shape { "Properties": { ... } }. One file maps to one topical category, registered in Sucrose.Manager.Manage.Internal:

File	Backing accessor class	Topic
General.json	Manage.General	Language, startup, telemetry/exception consent, app visibility/exit
Engine.json	Manage.Engine	Volume, screen layout, input, hardware acceleration, per-type engine selection
Portal.json	Manage.Portal	UI layout, opacity, pagination, Store duration, adult filter
Library.json	Manage.Library	Library location, selected wallpaper, delete behavior
System.json	Manage.System	Cached hardware enumeration (network/graphic interfaces)
Update.json	Manage.Update	Auto-update state, download limit
Cycling.json	Manage.Cycling	Slideshow active state, transition time, exclusion list
Backgroundog.json	Manage.Backgroundog	Performance rules, thresholds, communication type
Hook.json	Manage.Hook	Discord Rich Presence connection/refresh
Donate.json	Manage.Donate	Donate page state
Aurora.json	Manage.Aurora	Application engine process name
Warehouse.json	Manage.Warehouse	First-run / runtime state (Showcase list, tray hint)
Objectionable.json	Manage.Objectionable	PersonalAccessToken (sensitive — stored in plaintext)
Kernel.json	(no wrapper; key Information)	Kernel information

For the full key/default/range tables see Settings-All-Keys; for how the files are read and written see Settings-Persistence.

Log files

Logs live under %AppData%\Sucrose\Log\, one file per process per day, named <Process>-yy.MM.dd.log. The process names are: Undo, Portal, Update, Launcher, Property, Watchdog, Commandog, Reportdog, Backgroundog, AuroraLive, NebulaLive, VexanaLive, XavierLive, WebViewLive, CefSharpLive, MpvPlayerLive. The CefSharp engine additionally writes a native log named CefSharpNative-<date>-<guid>.log. See Logs-Diagnostics for the line format and how to bundle logs for a bug report.

Important file names

These canonical file names (from Sucrose.Memory.Manage.Readonly.Content) appear inside wallpaper packages and engine caches:

File	Role
SucroseInfo.json	Wallpaper package manifest (required). See Create-Package-Format.
SucroseProperties.json	Customization control definitions / saved values. See Create-Customization-Controls.
SucroseCompatible.json	JS bridge hook/template definitions. See Create-JS-Bridge.
SucroseStore.json	Store metadata sidecar.
Store.json	Store catalog snapshot (in Cache\Store\).
Pattern.json	Store pattern data (in Cache\Store\).
MpvPlayer.config / uMpvPlayer.config	Default and user-override mpv configuration. See Engine-MpvPlayer.
GifContent.html / ImageContent.html / VideoContent.html / YouTubeContent.html	Engine HTML wrappers used by the browser engines.

Process executable names

From Sucrose.Memory.Manage.Readonly.App:

Sucrose.Launcher.exe, Sucrose.Portal.exe, Sucrose.Update.exe, Sucrose.Property.exe, Sucrose.Watchdog.exe, Sucrose.Commandog.exe, Sucrose.Reportdog.exe, Sucrose.Backgroundog.exe, Sucrose.Undo.exe, and the engines Sucrose.Live.Aurora.exe, Sucrose.Live.Nebula.exe, Sucrose.Live.Vexana.exe, Sucrose.Live.Xavier.exe, Sucrose.Live.WebView.exe, Sucrose.Live.CefSharp.exe, Sucrose.Live.MpvPlayer.exe.

See Architecture-Overview for what each process does.

Single-instance mutex names

Sucrose gates single-instance processes with named mutexes (from Sucrose.Memory.Manage.Readonly.Mutex):

{Sucrose-Wallpaper-Engine-Live}, {Sucrose-Wallpaper-Engine-Portal}, {Sucrose-Wallpaper-Engine-Update}, {Sucrose-Wallpaper-Engine-Property}, {Sucrose-Wallpaper-Engine-Launcher}, {Sucrose-Wallpaper-Engine-Reportdog}, {Sucrose-Wallpaper-Engine-Backgroundog}.

See Single-Instance-Mutexes for how these gate launches.

Windows-owned state (not in the JSON files)

Some state is stored in Windows rather than in Sucrose's own files:

State	Where	Notes
Autostart-on-login	Windows Task Scheduler task Autorun for Sucrose (description "Sucrose Wallpaper Engine")	Created/enabled/disabled/deleted by Sucrose.Commandog.Helper.Scheduler. Driven by the RunStartup setting. To remove a stuck autostart, delete this scheduled task. Not a registry Run entry. See Troubleshooting-Settings-Startup-GPU.
Per-app GPU preference	HKEY_CURRENT_USER\Software\Microsoft\DirectX\UserGpuPreferences	Windows' own per-app GPU setting (semicolon-delimited GpuPreference=<n>; per app path), written by Sucrose.Shared.Space.Extension.GraphicPreference and driven by the GraphicPreference value.
GIF download cache location	%AppData%\Sucrose\Cache\Store\Temporary	The Portal repoints Sucrose.XamlAnimatedGif's loader here (its library default is Path.GetTempPath()). Cache files are SHA1 hashes (uppercase hex) of the source URL's AbsoluteUri. The Portal repoints both the cache location and its expiry: the active expiry is StoreDuration hours (default 3, clamped 1-24), not 30 days — the 30-day value is only the loader's un-overridden library default. See Cache-Management.

Quick lookup table

I want…	Go to
My settings	%AppData%\Sucrose\Setting\
My logs	%AppData%\Sucrose\Log\
My downloaded Store wallpapers	%AppData%\Sucrose\Cache\Store\
Crash reports	%AppData%\Sucrose\Cache\Report\
The installed program files	%LocalAppData%\Sucrose\
The bundled .NET runtime	%LocalAppData%\Sucrose\Sucrose.Runtime\
The autostart task	Task Scheduler → Autorun for Sucrose

See also

• Settings-Persistence
• Cache-Management
• Logs-Diagnostics
• Backup-Restore-Reset
• Settings-All-Keys
• Uninstalling-Sucrose