Toolsets and all command tabs everything vanished

V5, on WinXP media centre laptop.

Opened rhinoV5 and all tool paletts and tabs, everything gone, yet did nothing to cause this, had same file and just the one instance of V5 open 10 mins ago. reboot fails to fix it.

This fixes it, however should I have had any extra user created tool icons, would this have reinstated those as well ?

Is there a way of saving everything and reinstating from that instead ?

Better still V5 not to do this in the first place !