[SOLVED] Xbian stopped fully loading, supports telnet - how do I default it

[andy]

Please move this to a different forum if I've posted in the wrong area.
I've tried searching the forums - but if ive missed a solution please direct me to the link

Ive been running Xbian on a raspberry pi for a couple of months.
I did a number of addon upgrades last night.
Following reboot xbian loads the splash screen, but then leaves the blue screen without the full desktop.

It appears that Xbian is not fully loaded.
I don't see anything obvious in the boot up.

I can telnet into the unit.
Ive tried
apt-get install xbian-update followed by install.
All appeared to work.
I've also done an app update.
I assume something in my user config must be conflicting.
I can not see where my user unique settings are stored - so how i could default the install.

Ideally I'd prefer to do things from my telnet /ssh

So my question is how do I remove my user unique settings - specifically which file full path please do I remove.
Or can anyone suggest anything else to do a default - or cure my problem.

Regards Andy