The plugin API has been upgraded to version 2.1. This update includes a compatibility shim that allows some V1 plugins to function under V2 without complete rewrites—a major win for legacy workflows.
The tag appended to the version number signifies a "cumulative update" rather than a full version change. In the semantic versioning scheme used by the U-m-t team, -UPD- indicates a bundle of hotfixes, security patches, and minor feature enhancements delivered as a single installable delta. U-m-t Beta V2 -UPD-
For most users straddling the line between testing and production, represents a net positive—faster, more secure, and more robust than its predecessor. The plugin API has been upgraded to version 2