Updated to 1.8.7.7:
Updated the encryption library for added security.
This new version may not work in older clients (hard to test on my end, do let me know).
This version requires Microsoft Visual C++ 2022 (x86): https://aka.ms/vs/17/release/vc_redist.x86.exe
This is also required for your players. It is usually already installed for most, but some may not have it. The previous version of the encryption required VC++ 2010 (x86).
A custom approach as mentioned in the above post (https://rathena.org/board/topic/77080-grf-grf-editor/?do=findComment&comment=432591) will always be more secure.
If you do decide to rename cps.dll to something else, then you'll have to ensure your previous encryption cps.dll no longer exists. Otherwise, this will be pointless. You can leave the regular cps.dll from Gravity, that will not conflict.