Delete old backups from Backup job to free up space

Hi, I need to free up some space on my backup drive as its nearly full. True image 2014 used to let me see all the backups in my backup job in a time line and delete the oldest ones to free up space.
I can't see this function anywhere in True Image 2015 for PC build 6525
Do I now just delete the tib files with Explorer or does that still mess up the meta data
kind regards
Rick