Check for Application Updates looks for and installs newer versions of Yate.
Check for Action Updates checks to see if there are newer versions of actions on the resources web page than those you have installed. You will have the option to selectively install any or all updated actions.
If download actions were exported as being in a folder and you've renamed or eliminated the folder after initially installing, it is possible that an empty folder will be created.
If you have modified an action and you give it a greater number it will not be displayed as having an update.
Except for the preceding condition, actions are considered updatable if at least one action in the online zip file has a version number less than the current version number.