Well, if you're satisfied with your backup strategy, you can always load the old partition and try deleting ~/.enigma.
Will try that as soon as I finish setting up a local repo in this install (For all the stuff I use that is'nt on official/ppa or it's too outdated) EDIT :
I managed to fuck up the new install while trying to create an offline repo for my stuff
So after a clean install here I am, almost ready to fuck it up again, this time with an iso image and apton cd, no other method (Without php servers) is available it seems, even methods that used to work no longer do
I hope this time everything will go according to plan