There is a chance that MT Manager and the Magnetic Field Mapper don't run on Windows 7 (this problem should not occur in Windows 10, the C runtime is already included in Windows 10). This happens on PCs on which MT Software Suite was not installed before, or that don't have the latest Windows Update installed.
The text in the popup windows will show:
"The program can't start because api-ms-win-crt-runtime-1-1-0.dll is missing from your computer. Try reinstalling the program to fix this problem."
The two solutions are:
- install the c runtime component from the Windows website: https://support.microsoft.com/en-us/help/2999226/update-for-universal-c-runtime-in-windows
- Install the Windows Update of April 2017 (KB4015552, defined as "important", not "optional").