"Metadata improver halted" message

Hello,
I have the following message indicated by a red triangle in the top right corner of Roon: “Metadata Improver halted. Roon needs a software update.”
I’m still able to add music content to my library by forcing a rescan but metadata is not identified (which seems logical according to the error message).
While I’m waiting for a new software update (when?), how can I rebuild my library from scratch?
I’m running Roon version 1.1 (build 70) on a dedicated headless Mac Mini (Core) connected via Ethernet to a NAS from Synology.
Best regards,
Arnaud