Well upgrading to 7.5.8 is a good thing.
There are some security updates. As well as some minor upgrades.
And it should replace all the problem files.
Just make sure you do a fresh download of the zip file.
Because if you have a old copy ,it was probably updated since then.

And of course make a backup before you start.

Blue Man Group
There is no such thing as stupid questions. Just stupid answers