Did you already try the following from our installation instructions page:
If you get the message Could not load file or assembly ‘System.Data.SQLite.dll’ or one of its dependencies then you are missing a required Microsoft update. To fix the problem, go to https://www.microsoft.com/en-ca/download/details.aspx?id=30679, click Download, and then select and run the file VSU_4\vcredist_x64.exe
If you did and still have the problem, could you please tell me what version of SyncroSim you are using?
Thanks,
Leonardo