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STEP 1:
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BACKUP YOUR SITE!
Use Akeeba Backup for Joomla (free)
www.akeebabackup.com/
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STEP 2:
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Download Jomres update below:
updates.jomres4.net/getlatest.php
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STEP 3:
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Now upload this file "jomres.zip" to an empty directory on your server (website) and extract it.
Make a file called "search.php" and add this to the file:
<?php
echo shell_exec('
#!/bin/bash
find ./ -type f -exec sed -i \'s/com_jomres/com_butter/\' {} \;
');
?>
Replace "com_butter" with your "com_name".
If the above code does not work, try this one. This worked for me (Jan 2018).
<?php
echo shell_exec('
#!/bin/bash
perl -pi -w -e \'s/com_jomres/com_butter/g;\' $( grep -rl \'com_jomres\' )
');
?>
Run the file "search.php"
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STEP 4:
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Now Zip up ALL the files and directories and download it.
After you download this file, extract it to its own directory.
After extracting it, open an FTP program and upload ALL these files to the Jomres directory over riding ALL the files in All the folders (directoeies).
This WILL NOT work if you upload the ZIP file using cPanel and extract it.
After ALL the new files are uploaded and overwritten
For Jomres 9.10.x :
Run "jomres/install_jomres.php"
For Jomres 9.11.x :
Tools > Database Integrity Check
That's All!