Titanium backup only shows "Overview" tab
If @Firelord's comment doesn't work, try:


Settings -> Apps -> Titanium -> Force Stop and Clear Data and Clear Cache
Rename folder /data/data/com.keramidas.TitaniumBackup
Rename folder data/com.keramidas.TitaniumBackup on both your internal and external SD cards
Uninstall / reinstall Titanium Backup
Open Titanium Backup, go through initial welcome screens
Settings -> Apps -> Titanium -> Force Stop only
Restore the copy of the old /data/data/com.keramidas.TitaniumBackup/databases to restore labels and schedules


These days I backup Titanium Backup with Helium to avoid such problems :)