most programs like this can be installed on multiple computers.......IF THERE IS NO DONGLE....... you will need to register it ON ONE MACHINE.........install it on the shop pc 1st......... and REGISTER IT . then if you want it on the home pc.....disconect the internet.........and install it by pass the registration. it should function properly. to be on the safe side, when you need to use it at home, disconnect from the internet before you open the program.