If you have a previous version of the RHS Toolbox (version 1), you should be able to keep both version on the same computer.
If you purchased several licences or a site licence and you want to share data with other members of the team, you can share your data by placing the back-end database on a network drive. You first need to install the RHS Toolbox on each individual machines before setting up the back-end database on the server drive.