What problem are you having? I'm using the latest Windows i1Profiler and I only use CGATs txt files.
Problems is in first post, in animation image it's quite clear that the profile does not load for optimizations, no errors given.
If I open txt CGATS in older version then save as mxf it works.
The new 3.5 i1Profiler does not ask for data source when loading txt CGATS files, older versions asks. They removed the older gen hardware support but why remove support for app to open older gen txt CGATS files?