Keep history (history plugin) after an upgrade

[DavidFirefox]

Hello,
After an upgrade from 3.x to 4.3.4, I install my plugins, and copy my sessions and config file included the history file : history_data.dat in share/users/USER_NAME/settings, with rtorrent_USER owner like the original file.

But the history tab is empty.
Can we load the old history ?

Thanks in advance
Have a good day
David