Cthulhu is a homebrew application for managing play time history, step history and cached icon data. The goal of this app is to provide an open-source alternative to some of the 3DS Development Unit Software, alongside with extra features.

Current Features:

• Clear play time history: clears your play time history (it can be seen at Activity Log under "Daily Records").
• Clear step history: clears your step history (it can be seen at Activity Log under "Daily Records").
• Clear software library: clears your software library (it can be seen at Activity Log under "Software Library").
• Edit software library: allows editing of individual entries on your software library.
• Clear shared icon cache: clear all shared cached icon data, used by Activity Log, Friends List and Notifications (this will also clear your Activity Log title list).
• Update shared icon cache: iterates through all entries and replaces outdated ones.
• Restore shared icon cache: restores the previous shared icon cache in case something goes wrong while updating it.
• Clear HOME Menu icon cache: clears the icon cache used by HOME Menu, then reboots the console so HOME Menu can create it again.
• Update HOME Menu icon cache: iterates through all entries and replaces outdated ones.
• Restore HOME Menu icon cache: restores the previous HOME Menu icon cache in case something goes wrong while updating it.
• Reset demo play count: resets the play count of all installed demo software.
• Reset folder count: resets HOME Menu's folder count so that the next folder created is "1". (Only works if you run Cthulhu from Test Menu).
• Unwrap all HOME Menu software: unpacks all gift-wrapped software on HOME Menu.
• Repack all HOME Menu software: gift-wraps all software on HOME Menu. Mainly intended for testing the above feature.
• Remove software update nag: installed titles will no longer ask for an update when launched (until HOME Menu downloads version data again). This can't be used to bypass the hardcoded version check on "Ironfall: Invasion".
• Clear game notes: clear all of your game notes.
• Replace eShop BGM: replaces the current eShop music with a custom one.
• Restore eShop BGM: restores the default current eShop music.
• Change accepted EULA version: useful for allowing out-of-region online play (when set to FF.FF).
• Toggle HOME/Test menu: changes which menu the 3DS will boot on startup (Test Menu needs UNITINFO patch AND having test menu installed for it to work).
• Set play coin count to 300.

Future Features:

• Misc. features seen on dev unit software.

Obs.:

• Because HOME Menu doesn't allow accessing its icon cache while it's running, Cthulhu runs on extended memory mode.
• Clearing or updating HOME Menu icon cache may uninstall sdiconhax (a.k.a menuhax 3.x).