Hi Andy,
try to paste this instead (I added there Comma separated true, just to be sure it was implemented and slightly changed IDs):
<format id="{CE348030-6853-4582-9904-458D3B8C2400}" mask="*.csv" descID="9384" desc="Comma separated true, Name, X, Y, Alt" writer="CapturingReality.Export.ControlPoints" specificCoordSystem="1" >
<body>$ExportControlPoints($(name), $(actualX:.3f), $(actualY:.3f), $(actualZ:.3f)
))</body>
</format>
Save the file, be sure you want to export just Tie points (not GCPs) and select the option Export → Ground Control
Also, if this won’t work close and reopen your project. If it won’t work, reset the application using Make it like a clean install (open RC with pushed SHIFT and choose that option)