All of SemiHardcore's add-ons had the same problem as SemiHardcore itself, so I had to fix them one by one.

Additions

• Added a new message: trim-unchanged.
  • Appears when the player tries to change their armor trim to the one they currently have using /changetrim.
  • Set to "&cNothing changed; the specified armor trim is your current one." by default.

Fixes

• Fixed a bug where the armor trim selection menu would sometimes appear again immediately after selecting a trim.
• Fixed the /changetrim command returning a success message even when the player's trim didn't change.
• Fixed the plugin thinking the newest versions are unsupported