In a terminal session try:
  1. sudo apt-get update –fix-missing
  2. sudo apt-get install -f
  3. sudo apt-get dist-upgrade
  4. sudo apt-get autoclean
  5. sudo apt-get clean
  6. sudo apt-get autoremove

This should cleanup his environment and make sure he is current on the build he is running.   

After that launch chirp and verify the version is current  Daily-20170510  

If not re run these steps:
sudo apt-add-repository ppa:dansmith/chirp-snapshots
sudo apt-get update
sudo apt-get install chirp-daily