You can check your build number under Configuration | Support Information | About | Server version by clicking the gear icon at the top-right corner of the main menu in Veeam Backup for AWS. After installing Veeam Backup for AWS v2 Patch 1, your build version will be 2.0.1.622.
Veeam Backup for AWS v2 Patch 1 addresses the following issues found in the previous version: