I also don't know if this setting exists, but I would think that it would show up in the units file.
If it shows up there, note that there's a conversion utility to change the units appropriately.
Alternatively, it might show up in a custom report definition, but that would seem to be incredibly cumbersome to do and therefore unlikely, especially since Hexagon appears to be deprecating some of the report outputs.
If it doesn't appear anywhere, then finally, find and replace would be the final solution, though you'd need to do something like this in order to transpose 2 characters:
"." -> ".."
"," -> "."
".." -> ","