I think you mean 20180604, right? That client is the last most used for pre.
Then you can use any 2020 or latest recommended by rathena 20211103
Translation project: https://github.com/llchrisll/ROenglishRE
Yes, there are many free converters out there, but many don't know how to use and install dependencies. so I created this file to do everything automatically, Install Python, the Modules and it's ready to compile and decompile the file without any difficulty.