questions about multi client

Well ive been scouring the internet for ways to have multi clients in PWI and i cant get the renamer or rename it program to work.
Old name Element Client
New Name _______<-- insert name of choice
then i click rename it nothing happens i click on pw shortcut and it says
"Client Running unable to proceed with update....

if someone could give me step by step id appreciate it greatly TY.

i dont want to bot, to hack, or none of that lol. I just want a seller account while i grind on my main.

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this is what you need..
copy in the same folder as your elementclient :) first run this one, log in with selling account, and then you run the launcher and your original game. no need for renaming!

um what does this do exactly?

it is the original elementclient, patched so you can run it as many times as you want, an you don't need the launcher to launch it

#moved - no questions in this section.

what is the difference between using an editted version of the launcher.exe and using the renamer program to open multiple instances of PW? does one use less resources than the other?