A Developer by the name of Phexe has released an application called PSVeeter, which is used to view or delete backed up PS Vita content, here is a quote from the source:

A tool for viewing/deleting your backed up Playstation Vita content (via Content Manager Assistant).

What can it do at the moment?

• View

1. Playstation Minis
2. Playstation Portable & Save Games
3. Playstation Vita Games & Apps

• Delete Individually via Right clicking name
• Shows the Title, the Playstation ID Code and the Size of the Game/App
• Automatically retrieve the path to your Vita Directory from Registry
• If Sony’s Content Manager Assistant is not installed or set up, you can specify a directory to use

Known Issues

• Has trouble deleting item if Icon is in use by windows explorer.  You can rememdy this by either restarting your PC or Explorer.exe (Windows Issue)

Coming Soon (Todo List)

• Add more details from the local SFO file to the information box  on the right.  Ie./  Tech details.

Maybe add Web information retrieved from gaming sites or just links to product pages

Download – Binary ( Source )

Source PHEXE Industries
Via PSX Scene

Don’t forget to visit the Vita Dev Wiki, which i must give deroad a HUGE thank you for maintaining most of the time:
http://www.vitadevwiki.com/