The default Measurement System setting chosen by Dispatch is based on the the Windows Measurement System. If you chose your Country setting correctly during the Windows setup process then the default setting should be correct.

We often encounter a problem in Canada where, when doing the initial setup of Windows, English (United States) not English (Canada) was selected for the country setting. In that case, Dispatch will set the default Measurement System to Imperial (U.S.) instead of Metric.