Both .ilabel and .ienv files come from software called iData and both are actually templates, but direct ilabel to ienv conversion does not seem very likely, considering these templates are for different kind of content. In any case, iData is the only software that can help you out, so if you have issues with export of these templates or have some other kind of problem, it would be best to reach out to their support or user community.
Updated: August 10, 2023