[4.0.5] Bug Fixes

Fixed

• Modpack Folder Navigation:
  • Fixed duplicate folder window opening: clicking the "Folder" button or context menu entry inside a modpack now opens only the specific modpack's directory in a single window instead of also opening the parent modpacks directory.
• Modpack Mod Listing & Deletion Isolation:
  • Resolved cross-modpack modlist leakage where deleting or disabling the last mod of a modpack abruptly displayed mods from another modpack or .minecraft/mods.
  • Empty modpack mods folders are now strictly preserved and display the empty state card ("No mods found") rather than falling back to global .minecraft/mods or loose matches.
  • Removed fuzzy UUID substring matching and empty ID collisions in mod directory resolution.
• Mod Disable / Rename Persistence:
  • Fixed mod toggle persistence on disk: disabling a mod atomically renames .jar to .jar.disabled (and vice-versa when enabling) with retry handling for transient file locks.
  • Forwarded explicit pack_id from Slint through Rust to ensure mod toggle and deletion actions always target the active modpack.
  • Synced file status and names in modpacks.json and linked installations, and rolled back UI state if a file operation fails.
• Skin Locker Deletion:
  • Fixed skin deletion bugs when deleting the currently active skin or the last preset in the locker.
• Wallpaper Management:
  • Fixed clearing and resetting of the equipped wallpaper when deleted from the downloadable or custom wallpaper roster.
• Update Handling:
  • Added an update button to the notification toast
  • Fixed update check on startup

Added

• Wallpaper Upload Formats:
  • Added support for custom wallpaper uploads across all standard image formats (.png, .jpg, .jpeg, .webp, .bmp).
  • Added ability to delete/hide downloadable wallpapers without requiring them to be downloaded first.
• Modpack Creation Icon Palette:
  • Integrated 35-block texture palette and custom icon selection into the modpack creation view.
  • Implemented dynamic upstream version filtering for all loaders (Forge, NeoForge, Fabric, Quilt, Vanilla) to automatically reflect supported Minecraft versions.

Note

To install the launcher please download:

• NLCSetup.exe (Online installer)
• NLCSetup-offline.exe (Offline Installer)

For linux refer to this guide

The other files are there to allow for fast updates for existing users.