After the power failure a scan disk run? It mangled something.
F2 > Preferences > Bookmarks > make sure the bookmarks pluging is activated.
Needs restart.
If You are missing the old bookmarks.html file (bookmarks gone?)?
Menu: Edit > Konfiguration > Profile Directory.
Open Bookmarks_backup.html as html file in browser.
If it is the lost bookmarks rename to bookmarks.html.
If not the right bookmarks?
Go up one level and look - there will be another Profile.
Look into it and open bookmarks.html with the browser.
If this contains the right bookmarks?
Go to Profiles.ini and alter to Path=Name-of-the-profile-that-contains-the-right-bookmarks
If none applicable do a better report what is wrong!