Upgrade to Latest Version

[peter.munnelly]

When I have ran an upgrade in the past, I have lost some customisation of the system that I have made.

What is the process to perform the upgrade without having to lose any settings that have already been changed?

[TheGr8Wonder]

What are some of the customizations that you are losing during the upgrades? Let's start there.

[pdwalker]

For what it is worth, I've never lost a customization I didn't expect to lose; e.g. customizations to the MailScanner php code.