You have version 7.5.7
You could just unzip a new 7.5.7 file and upload and follow the upgrade procedure.
Remembering to exclude the files noted in the upgrade manual.
No need to copy over the install folder or run upgrade.php.
Then at least you know all the stock files are restored back to normal.
You have already uploaded the important files that are excluded in the upgrade document.
The ones that are altered during use.

Instead of searching and replacing one at a time.

FYI,
It is a known occasional bug that config.inc.php will get zapped.
But all the other files should have been fine .
That is why I feel it is a server issue.

Last edited by Ruben; 02/15/2014 5:01 PM.

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