Thrilled after installing M1 of NB68 I fired it up and the first dialog was a disappointment. It didn't see that I have a NB67 installation, instead it asked if it was okay to import the settings of my NB65 installation. Bummer.
I reverted back to NB671 and will give NB68M1 a second try later today. Recreating all settings myself and will file a bug on it.