Notes about the ATZ file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries
, unused processes and other unfavourable system settings to identify slowdown issues.
The ATZ file type is primarily associated with 'Aston' by Gladiators Software. Aston is a Desktop manager and Shell replacement for Windows. Starting from version 1.9.2, Aston creates compiled Themes in ATZ format which are not supported by the previous versions of the program.