The single-user license allows you to install the software on a reasonable number of computers, provided that you are the only individual using the software.
If you are an entity, you must designate one individual within your organization to have the right to use the software.
If more people are going to use the software, you need an additional license for each of them. We do offer multi-user discounts; just let us know how many users require a license and we'll send a quote.