When given the option to checkbox 'install automatically' on an older (several days since packer plugin install), there is now a way to "install from packer site" with a pulldown list of the options (i.e. Packer 0.7.5 linux-386).
Problem: Fresh installs only get 4 options, with bare text boxes:
extract from *.gz
Install from packer site (just a textbox to fill in, no options)
Desired outcome: a way to get the "install from packer site" to force a 'pull' or 'refresh' so there is a pulldown option to select like the other system that has been just sitting for days (versus a fresh install that is not useful).