Hi
On my PC aacenc3.exe is found in the the Programs/NCHSoftware/Components folder. Whether or not it runs from there in connection with Videopad I am not sure as it's an addon for the NCH Golden Videos VHS-DVD software. (Which I have had installed in the past...(Use Dazzle hardware and the accompanying disc program now))
The components folder at (user name)/AppData/Roaming/NCH Software/Components does not seem to contain aacenc3.exe.
I think I would place it in the Programs/NCHSoftware/Components folder and forget it. It's OK here.
Nat