This is a once only fee for an upgrade to version JSEAsy v4.4.1Multiuser Rental from v4.4.1Single User Rental
This upgrade applies to v4.4.1 standard/ base single user rental
This will give upgrade your existing data file and give you multi user access
All of your existing data will remain intact. All of the multi user features are added to your existing data file to upgrade you to v4.4.1