Skip to content
ArcticLAUNCHER

Release notes

Arctic Launcher 0.4.1

October 12, 2026

What's new#

Fixed#

  • Big Fabric modpacks start again with the Arctic Client (COBBLEVERSE and others on Fabric Loader 0.18 or older): the game no longer crashes at start with "Mixin transformation … failed" / "ArrayList cannot be cast to AnnotationNode".
  • Modpack downloads no longer hang: one stalled connection used to hold a big download (a 239 MB modpack, say) for over an hour. Big files now arrive in small pieces, and a piece that stops is fetched again on a fresh connection.

Launcher#

  • Choose where Arctic keeps its files: Settings → Storage moves everything (game files, Java, worlds, accounts, settings) to another folder or drive, and the first start asks too. Each instance can also keep its worlds, mods and packs in a folder of its own, or use an existing .minecraft folder as it is.
  • Quick tips in the sidebar: one of Arctic's features at a time, a new one every few minutes; click to open it. Settings → Show quick tips turns them off.

Download#

Windows: arctic-launcher-windows-x64.exe · macOS: arctic-launcher-macos.zip · Linux: arctic-launcher-linux-x64. The Windows files are signed (Open Source Developer Leyla Barlak, Certum).

SHA-256#

FileSHA-256
arctic-launcher-linux-x64bb8c38208a64bc511dfced8652d599e4a647e6ceaea277a530e55db8233a55d9
arctic-launcher-macosff9bc3b0c999a30c2ee68b0c2cc212b7d8d0b6bd86ee47eaa1df94267adc25f1
arctic-launcher-macos.zip0fbce0ad5900c44c00ece03a01a912991aca0b615ce0aa5793189ce71dfc4178
arctic-launcher-windows-x64.exe966e7498a4ddcef727683e46f30f9dcbb12a0efa2c52dcc0a96f0bbfa4d52947
arctic-linux-x6479cfda7abe60f826a287d1c2261d231a328b382c980220215d2acf22dc263a07
arctic-macosd01557610672e90c5e012d70a71171bcd30bc3e97c91ff444f8aabb9cfc09b75
arctic-windows-x64.exe9e8ed3097bc9ef2a85235758677e73e594a8521388206298c7b20848497d6f58

Check a download: Get-FileHash <file> (PowerShell) or sha256sum -c SHA256SUMS.txt (Linux).

Full Changelog: https://github.com/brksfrb/arctic-launcher/compare/v0.4.0...v0.4.1 (opens in a new tab)