If you've been using AccountEdge 2005, you do not need to upgrade your company files to the Network Edition; however, you do need to move your company files to a new location on your host computer so the workstations on the network can access them.

You do not need to upgrade if you've been using MYOB AccountEdge 2005

If you’ve been using AccountEdge 2005, you do not need to upgrade your company files to the Network Edition; however, you do need to move your company files to a new location on your host computer so the workstations on the network can access them.