Flock just failed again this morning, the way that I did a while ago, see last post here.
I did the same as in last time, i.e. uninstalled it and install again the current version 0.4.10 I made a mistake.
This time I made a copy of the profiles folder and copied everything within the folder to the new installation. Flock didn't like it. Something in there must have caused the failure, process has to be repeated.
The 2nd time I copied across just the flock_favorites.rdf and prefs.js file which saved me setting up favorites and preferences such as content settings etc. The signons.txt file can't be reused, which is a good security feature, therefore you'll have to enter all the passwords again and let flock remembers it.