Create a Manage-IT hack to add new users

Manage-IT is a discontinued and unsupported client-server database application built with Visual Basic, with Crystal Reports and a Microsoft Access Database. I have a lot of custom software built on the app, and it does what I need, so I don't want to abandon it. I really need to add some new users, and would also like to move the software to an upgraded hardware server (which the license won't allow). The key may be in the "Raw Data" directory which includes a .mdb (Manage-it Data Base) file that the system won't let me open. It says it is a system configuration file. The last time I upgraded 4 years ago, LogicBuilt customer support had to do something on their end, and my server talked to theirs during installation. Logicbuilt no longer exists, so no technical support. It is time for self-help. I have attached a demo version of Manage-IT for your review. No license required to install. Looking to do this ASAP.