Thread:Project:Support desk/How to run the update script

I recently downgraded my mediawiki from 1.19 to 1.16 to establish a working environment for an outdated extension. Since I'm no expert in all this database/php stuff I thought it would be easiest to just download the entire wiki and update it on my local machine. Here is what I did: While the regular accessing functions of the Wiki work just fine, I find myself unable to create new users or admit changes in the personal settings. When attempting, I receive various database errors. After a short search in Google it looks like that the databse isn't working properly with the Wiki due to the un-updated database. Now I wanted to update it and the manual told me to run the command "php update.php" in the maintenance folder. But how do I do that? Cygwin does not know the command "php". Do I have to do this on the server directly? If so, how to do that? I connect to the server via FileZilla which does not provide a command line. Thanks in advance
 * downloaded the wiki, copied it to a backup folder
 * downloaded Cygwin terminal since I'm on a windows machine
 * downgraded the wiki via Cygwin terminal
 * skipped the database update since I thought the database needs no changings
 * installed the extension
 * reuploaded the 1.16 wiki with the extension