Using on multiple computers

Hello Jon and staff, I am an older user of directory opus on the Amiga Platform and am moving over to the window, I currently have several different versions (7 and 10) each computer I use is for a unique application/s. Such as CAD or Music or general use, I also would like to use it to support my families computers. I want to be legal on how I install and use it. What do you recommend as my best way to do this. Direct install or usb install ?? need your help on what to purchase and how to use. Thanks in advance on your support.
Don Strauss USA

You can add additional licences, either for normal installs or USB installs, depending on what you want.

Please see Common purchasing, upgrading and licensing questions for answers to most questions in this area, and let us know if anything is still unclear.