Support

Mandatory information about my setup:

Have I read the related troubleshooter articles above before posting (which pages?)? Yes
Have I searched the tickets before posting? Yes
Have I read the documentation before posting (which pages?)? Yes
Joomla! version: (2.5.14)
PHP version: (5.4.20)
MySQL version: (5.5.34)
Host: (optional, but it helps us help you)
Admin Tools version: (2.5.8)

Description of my issue:
I have used Admin Tools to update Joomla to the latest version of 2.5. Now I have an emergency and need to use Admin Tools to reinstall all of the core files. How can I do that when there is no upgrade notice?

Nicholas posted these update instructions a couple of weeks ago. In your case, you would need the full package, not the update package.

If you want to reinstall your current Joomla! version, of course you can. You always could, ever since Joomla! 1.6. Admin Tools didn't make it possible, it made it obvious. The non-obvious Joomla! approach (one of the two, I'm presenting the one which doesn't involve downloading/uploading anything):

1. Go to http://www.joomla.org/download.html
2. Click on the "Upgrade Packages" button (Joomla! 3.x) or the "Other Joomla! 2.5.x packages" (Joomla! 2.5)
3. You will see a Joomla_X.Y.Z-Stable-Update_Package.zip file, where X.Y.Z is the latest Joomla! version. Tip: if you need an older version, from the left sidebar click on the Joomla! version you want (e.g. 3.1.0), Browse Releases and find the package you want.
4. Right click on the package you found and choose Copy Link Location (or whatever your browser calls it)
5. Go to your site's Extensions, Install / Uninstall
6. In the Install from URL area paste the link you just copied and click on Install