Even if the server is installed as a service, it is still possible to run the TRASSIR Server with the interface.
To do this, first stop the service via Windows Services (win+R → services.msc) menu or with the command (win+R → cmd):
sc stop trassir
Then navigate to the directory with TRASSIR installed and run the file watchdog-vc120.exe (if x32 TRASSIR server installed) or watchdog-vc142.exe (if x64 TRASSIR server installed)
To return to the service mode, stop the TRASSIR server and start the service.