If you can't get your file to open with the programs mentioned above, there's a good chance that your file isn't in any of those formats.
Ọ bụrụ na ịnweghị ike ịmeghe faịlụ gị na mmemme ndị a kpọtụrụ aha n'elu, enwere ezigbo ohere na faịlụ gị adịghị na nke ọ bụla n'ime usoro ndị ahụ.