Mercalli is easily updated via the download link.
The update is downloaded by clicking on the link from the purchase confirmation email. Then install the package - that's all.
Note:
The update must be performed for each Mercalli component
[32bit plugins, 64bit plugins, SAL].
Here registered users can download free updates in the form of "Service Packs".
A full version or demo version of Mercalli 1.0 is required for this service-pack.