OK, I’m one step closer. I downloaded and installed the C++ file, and I got one of my old libraries into SyncroSim 1.0.44. I then took my library, updated to S.S. 1.0.44 into S.S. 2.0.9 and received this message when trying to open my library: “The library ‘CArevised-TEST’ cannot be loaded because the Add-On ‘Dynamic Multipliers’ is missing.”