About the libs of very old FMOD Ex 4.13.4

Lately I’m working on a program which uses the very old version of FMOD, specifically FMOD Ex version 4.13.4 from the year of 2007.
However, I happen to only have fmodex.dll (version got from that dll), so I can’t do anything about migrating to modern FMOD.
I don’t expect the headers or libraries about it since it’s old enough to be lost, but could you give me some informations about them?

I have given you access to the FMOD Ex Downloads. Look for them here https://fmod.com/download#fmodex

FMOD Ex is unsupported so we do not provide support for it.