Version 4.8 supports the newer Sinumerik One interface with the "Create MyVirtual Machine" tool. Version 4.7 is strictly for legacy 840D sl hardware. Stick to 4.7 if your shop runs older controllers.
SinuTrain requires specific network permissions to communicate with the virtual CNC kernel. Ensure TCP Port 4840 is open in your firewall. siemens sinutrain 47 fix download