If your version is older than V1.3.8 (the latest stable release as of the last confirmed update), you should proceed. If you are already on V1.3.8 or later, no update is necessary.
Blaupunkt typically releases software updates through its regional distributors or dedicated support portals. While there is no universal "one-click" global link, you can check the following authoritative sources: Blaupunkt San Marino 330 Software Update Download
For the San Marino series, updates were released every 12–18 months. The last known stable version was in late 2022. Do not expect frequent updates. If your version is older than V1
If you are specifically looking for navigation data, use the Naviextras Blaupunkt Portal , the official site for map content. How to Perform the Update use the Naviextras Blaupunkt Portal