Sorry for the delay in getting back to you.
Generally yes, showfiles are backwards-compatible between minor versions (e.g. 11.1 to 11.0 is fine), but only forwards-compatible between major versions (e.g. 11.x to 12.x).
Specifically in the case you refer to (11.1 to 11.0) there should be no issues, but as always it would be a good idea to test anything particularly critical to ensure it works as expected.
That said, we have had some reports of issues with loading 11.3 showfiles in 11.2, 11.1 or 11.0, especially regarding shapes. If you encounter any issues in loading shows in different versions, please file a help desk ticket (
https://www.avolites.com/software/help-desk/) and we will look into it for you.
Thanks,