I did an upgrade of my Linux distribution. I was hoping that it would be simple to restore my LibreOffice settings from the backup that I made. (Although I had some concerns that LO would be a newer version.)
EDIT: I just copied all the backed-up files-folders that are in “…/.config/libreoffice/4/user/” and pasted them (overwrite all) into the same folder of the newly installed version. Most things seemed to work without problems: I had created toolbars, macros, styles – they all worked.