Thanks for your help. As I said, the following issue doesn't seem right:

'I've noticed that, in my partially completed app, the 'Ready to Install' dialog displays the [INSTALLDIR] compiler variable value in the 'Current Settings>Destination Folder' value, and not the actual folder selected in the 'Select Install Folder' dialog.'

Do you see the same thing? If so, how do you get the 'Current Settings>Destination Folder' value in the 'Ready to Install' dialog to show the actual selected Destination folder?

Later: Never mind, setting variable %_SB_INSTALLDIR% to %MAINDIR% (the selected Destination folder) in the previous dialog fixes the prolem.

BTW, have completed my evaluation and have now purchased SB Developer. It's a great tool with a lot of power under the hood.