I would contact PTC. I think it is related to your windchill setup but I have never used windchill.
Last ditch suggestion... Is it possible that you just need to choose a local drive location rather than your workspace and then the new file types show up?
The built in movie exporter in Creo hasn't been updated since they folded it in decades ago. It is out dated and terrible.
I would suggest looking into screentoGIF. Its open source very easy to use and will get you a lot better result than what Simulate outputs.
Firstly you need to run the animation, and then go to File --> Save As --> Save a Backup and then select the file type to Movie, Thats it!!! Please refer to