-key(Copy URL in PhpBB Forum Format - Info)
Start iMacros with the specified license key, for example as Player. This ignores any license key that the user might have entered. This method is recommend for distributing iMacros, as it does not require the user to enter any license key. Plus, you have the correct key even if the user downloads a trial version for any reason.
imacros.exe -macro test1 -key KDLA6-PNX66-KMQQX-PRMI6-N7BU4-ZCTB5