Help with Model01 spanish custom firmware

Hi.
I am having lots of problems with an spanish layout that jordihs sent me long time ago. When I try to use it, it says that MACRODOWN is deprecated. I have no programming idea to fix it. Could someone help me, please?

This is the file:
https://global.discourse-cdn.com/standard11/uploads/keyboard/original/2X/1/1f7bc106152d9a2c8e9d9f9d8058dde3b8b7c800.ino

Thanks a lot.