What is the best way to upgrade 18.104.22.168 to the latest version of the 1.9.x branch?
I have heard that using Magento Connect to do the upgrade is very dangerous, where upgrading manually (unpacking the latest version, then copying your folders into it is safer.)
I ask you all, the experts, which way is better? (If the manual way is safer, what are the folders that I need to copy over? Is there a how-to documented?)
You have two options:
1) Apply all patches to your Magento 22.214.171.124 (and you'll be with the latest version).
2) Override manually all core files. 126.96.36.199 includes all patches.
There's a third option with Composer but isn't used by most ot the stores on Magento1 so I guess you should choose between the first two options.
Remember to make a backup before an upgrade.
You can either upgrade Mage_All from Magentoconnect and that should help, or you can manually copy all the Magento 188.8.131.52 Magento files to the root of your Magento.
@MageMod_Ext, is MagentoCOnnect still working for upgrades? (since last friday, Septembre 15th, was closed)
As far as I know, 184.108.40.206 is quite outdated version and I'm not even sure enough whether the official Magento Data Migration Tool supports such kind of transfers. In your case, you may try this tool: https://goo.gl/ucDCEr.
These are the supported versions for the Data MIgration Tool:
Also the following versions are already supported if you choose to migrate from Magento 1 CE to Magento 2 EE:
But in this case isn't necessary. You can override core files (if you didn't change it) or you can apply patches.