May have found already information online how to remove the Commas for dimensions in Windows computers:
If you are wanting to create accurate shadow diagrams for your sun studies or to evaluate your design, ArchiCAD can help by allowing to set both the date and time of your rendering. To do this, go to your 3D projection settings dialogue box ( View > 3D View Options > 3D Projection Settings )
You can embed time-stamped notes in your ArchiCAD file by going to the File menu, and choosing Info, Project Notes. This is good for leaving notes about what you have done so that other users can see them, or as reminders for yourself.