You can do it through your website.
To restore a removed domain in Domain Manager:
- Open the WordPress admin panel of the website whose domain license you want to reinstate.
- Go to Settings > Beaver Builder > License.
The license still shows as Active, but do the following steps to record it back into Domain Manager.
- Click Enter license key and enter your license key.
- Click Save license key.
Now if you check back in Domain Manager, the domain is once again listed.