Can we try and keep this to the original problem of the upgrade.
If you are not bothered about those mods then this is the best method.
Download the complete 2.0.19 package.
make a complete backup of your board files and database (just in case 8O )
ftp the config.php to your desktop and keep safe.
Unzip the download and then ftp the contents to the correct place to overwrite the files that are there on the server.
Now ftp the config.php back to the server.
Now run the file http://yourdomain/yourphpBB2/install/up ... latest.php
Now delete the install and contrib directories
Now re-install the mods if you want them. The tables and extra fields they may have used will still be there in the database.
The truth is out there.
Unfortunately they will not let you anywhere near it!