Predefined Programs are already build, for your convenience. It is still possible to edit them however.
As the name suggests, it is a pre-build program that updates the installed XEOX agent. It automatically updates to the current version of the agent, but you can also select the release candidate or long time support too, by editing the first field. (You can find more information under Client - Agent Update)
For more information regarding the individual fields, please look at their respective entries in Actions.