Do not install 2.21 over 1.92 or 2.10. The MSI database will conflict.
Note: Leica’s public FTP structure changes frequently. As of this article, the valid hash is: Leica Survey Office 2.21 English Download UPD
Cause: You accidentally downloaded the Multi-Language version without the English locale. Fix: Uninstall completely. Re-download the file specifically labeled “ENU” (English). Do not use the “ML” (Multi-Language) package. Do not install 2
During setup, Windows will ask: “Would you like to install this device software?” – Click Install (three separate times for three drivers). Failure to do this will brick your USB sync. Leica Survey Office 2.21 English Download UPD