I guess you want to use it in order to create a wallet for Monero. Unfortunately I don't know what it is it, nor I knew what was Copay before that thread. Are you sure that by "tool" he meant a creator for dummies and not something like Notepad++ ?
This is not for Monero (Monero's GUI wallet is a massive beast by itself). The tool is, I guess, a set of API and SDK. I hope someone will know.