The first button is to execute the currently active script. The debug command line is specified in the language tab of the options dialog.
The second button is to debug the currently active script. The debug command line is specified in the language tab of the options dialog. Note AutoIt and Batch languages do not provide debugging capabilities, so this option is not supported for these languages.
The drop-down list for Enter Arguments may be populated with any command line switches you would normally enter at the end of a command line. For your current session, the drop-down list will be populated with any text you enter. This allows you to easily switch between multiple arguments you may wish to pass. This information is not saved, and will be cleared from memory when you exit ASE.
In KiXtart, this would populate the $PASSWORD variable with a value from the command-line. Note that no spaces may be used (as required by KiXtart).