Prybe, you are posting in a 1.x help section.

I recommend you first check the installation and breaking changes documentation:
https://examples2.ext.net/#/Getting_.../Installation/
https://examples2.ext.net/#/Getting_...AKING_CHANGES/

And then, if you still need help, look for migration threads in the 3.x help section:

http://forums.ext.net/forumdisplay.php?31-3-x-Help

Regards,