v0.5 is the final version of Starfall - there won't be any new versions.
Just run the application with the Twilight hack or Homebrew Channel, or any other preferred method. Follow the on-screen instructions from there. You can choose which patches to add or remove.
These hacks only work with the System Menu 3.2E(v290) or 3.2U(v289). If you have any other version, it will just return to the loader. If you have another version of the System Menu you may consider using AnyRegion Changer 1.1 to install 3.2X to your console.
This tool does not update any SHA1 hashes or signatures. Currently IOS isn't checking those, but that could be fixed in a future update.
Just load it and carefully read the on-screen stuff otherwise you won't be able to install it.
All hacks are optional and can be installed or removed separately.
The Rescue Menu is a built-in menu by Nintendo, it doesn't make your Wii unbrickable. If you install another System Menu, all hacks will be removed.
Your System Menu will only be patched, it won't be deleted. This makes the patch progress very brick safe.
The WiiKey2 config/update disk may have problems do to some Starfall settings. Please remove the Update Blocker and Region Free (both GC and Wii) settings of Starfall as the WiiKey2 has the same settings.
Region free GC games with video mode patch
Region free Wii games
Region free channels
No mainmenu BGM
Start rescue-menu when Y is held on 1st GC controller
Remove rescue-menu diagnostic disc check
Replace health warning with backmenu
Skip disc update check