The latest PWO Client release is 126.96.36.199
Full installer for v188.8.131.52:
Please note that Pokémon World Online is a Public BETA project and therefore glitches may occur at any time.
For Windows 10 users, if you get a Windows Smartscreen prompt blocking the installer - you can click on 'More Info' and then 'Run anyway' to continue the installation.
The map editor allows potential and current mappers to build maps, which could become a part of the Pokémon World.