from Rig Manager Manual, Page 21:
The Tools Menu
Backup and restore Rig Manager’s entire content
Those backups contain the entire content of your Rig Manager including all Local Libraries and excluding the content of your Profiler. The backups are cross-platform compatible, in other words you can use them to transfer your Library from Macs to PCs and vice versa.
Use this backup to migrate your data from one computer to another.
✔✔Note, that this is a different backup to the one you can create in Profiler and put on an USB stick.