SANDYKNOLL  Metric units, or any of the other supported units, can be both entered and displayed.

To enter data using other units, enable the Data Entry Mode, found under the tools menu, and choose the unit of your choice. Or you can use the main Data Entry form as well.

All distances/calls/etc. that are displayed on screen can also be viewed in any of the supported units of measurement as well. The display units can be chosen on the same screen where the particular text is shown/hidden.  
(Version 2.5.1)

SANDYKNOLL  Thanks. This review contained more detail and was a lot more helpful.

> i get the occasional ... dialog with an

> error message...

If you could email us the exact error message, that would be very useful.

  
(Version 3.6.1)

SANDYKNOLL  Metric units are already available.  
(Version 2.5)

SANDYKNOLL  Negative reviews that contain valid, useful information are actually helpful as it gives us something to improve on. Sadly, your review contained nothing of value.

Your comments about the stereograms made little sense and your comments about the 3D glasses are mostly wrong. 3D glasses come in many combinations of Red and either blue/green/cyan. And yes, blue and yellow/amber glasses also exist.

As for the Convert button being disabled, it would have been enabled if you would have made a selection. The big Select All button makes this very easy.   
(Version 3.6.1)