Create new folder anywhere and name it the same as the game.
Download ZBNetDL.exe INTO this folder.
Run ZBNetDL, select needed game and language, wait for "Download true" at the end of ZBNetDL.txt, if window closed without this line - rerun.
Download ZClient into the game folder or any other folder and run it.
Drag and drop game's main exe(not the launcher) into ZClient.exe or ZClient window.
Or you can create shortcut for ZClient, open its properties and add to cmd line, after "ZClient.exe" "D:\path\to\game\game.exe"
Examples:
"D:\Games\ZClient.exe" "D:\Games\Warcraft III\x86_64\Warcraft III.exe"
"D:\Games\ZClient.exe" "D:\Games\StarCraft\x86_64\StarCraft.exe"
It will automatically run ZClient, log in (if autologin is enabled) and will run game after a successful login.
In W3R, if the game was downloaded with another method, path can be "Warcraft III\_retail_\x86_64\Warcraft III.exe"