There is no detection method logic to check that a file doesn’t exist for a required Application.
You have two options to accomplish this:
1. You run a script that creates a file after the uninstall if complete. Then use the file as a detection method.
2. Run a Powershell script that checks that the file is missing and return $true.
Option #2:
if (-Not (Test-Path "c:\Program Files (x86)\Program\Program.exe") -and -Not (Test-Path "c:\Program Files\Program\Program.exe")) { $true }
