just a note for someone with same problem:
my routine:
1. doublicated my modx installation folder
2. copied all the upgrade files into the dupe
3. pointed the domain to the new folder
4. run the setup
After that I had some problem with the upgraded installation and found in the config that only
MODX_CORE_PATH
MODX_PROCESSORS_PATH
where updateded to the new path
all other paths still pointed to the old directory
I had to manualy update all paths
Maybe a hint in the upgrade docs to check the config paths could be helpful.
