I have uploaded a new version of my MSX/Coleco Sprite and Tile Editor: Version 1.0.8115.34244
Small update, you can now move tile patterns around in the set of 256 tile patterns using the directional buttons below the Tile Set.

Moving a tile swaps it with the tile in the direction you press.
Suggested by long-term friend and fellow home brewer Claus Baekkel
Download the latest version here: