Can someone direct me where to find settings for Konqueror?

More importantly, where they are located in Kubuntu 18.04.

Recently, I upgraded from Kubuntu 14.04 to Debian 9 with KDE to Kubuntu 18.04. Somewhere along the way settings for Konqueror were lost. Bookmarks, sessions and toolbar settings have vanished. I have a back-up of my home folder prior to this migration. The files are intact but probably because Konqueror's settings are in a different location, the old settings are not being applied.

Thank you for taking the time to read this.

Where in Kde 4.x the settings were all under ~/.kde/share, in Kde 5.x they switched to the new standard locations: $XDG_DATA_HOME (default ~/.local/share, used more for data storage including themes) and $XDG_CONFIG_HOME (default ~/.config, used for settings files)

Thanks for this airdrik!