Upgrading BricsCAD or extending your subscription (Single/Volume license)
When you have purchased a version upgrade for BricsCAD and you are connected to the internet
After installation of the new version, upon launch, a pop-up displays saying that your license was updated to the newer version.

This shows after launching BricsCAD, before the BricsCAD Launcher dialog box appears.
When you have purchased a product upgrade or have extended your subscription license
Retrieve your key from the My licenses section in your account. Next, go to the License Manager dialog box, select the Activate Now... button and enter your key.
When you can’t connect to the internet
If the license was activated offline, you need to revoke it first. See the Deactivate or revoke a license article for more information. If no more revokes are available, you have to contact support.
Next, follow the process described in the Offline/manual activation (Single/Volume license) article.