have a look into files! whether all seems in order.
(hope restart //bot OS & k-m// will help - and or imidiat seeable fault is found!
Else it can happen that You broke browser?
IFF deinstall completely or use new install name (k-m_nd or.. if You do not find any obvious damage & k-M still missbehaves.
best regards. (i am not much help ? sorry).
greeting from Hannover
Have uninstalled it and cleaned out registry then reinstalles using another d/l , still the same password keeping don't work. Strange it did before crash