Upgrading Joomla with Addon domains WILL MESS YOUR SITE UP

[BLieve]

I had to get IT to help me undo it but my site is still messed up, all I see is a homepage. Just letting you guys know so you don't have to go through the same mistake. But now I am wondering how am am I suppose to upgrade to the new Joomla?

[digiblur]

I had to get IT to help me undo it but my site is still messed up, all I see is a homepage. Just letting you guys know so you don't have to go through the same mistake. But now I am wondering how am am I suppose to upgrade to the new Joomla?

Do it manually, the only real and safe way.