Hi,
This can be done by using File Removal file operations. You can read more about this here:
http://www.advancedinstaller.com/user-g ... ialog.html
Basically, you need to create the File Removal operations only in the Upgraded package to include them in the patch. Also, a file removal should be placed in the folder in which the file exists (in the "Files and Folders" page).
For example, if the file "test.txt" which you want removed is placed in "Application Folder" -> "My folder", then the file operation should be created in "Application Folder" -> "My folder".
Regards,
Cosmin