Please confirm that you are running Veeam Backup for Salesforce 1 (build 1.0.0.1429) or later before upgrading. You can find the currently installed build number in the Configuration > About section.
After the upgrade, the Veeam Backup for Salesforce build number will be 1.0.2.1992.
This form is only for KB Feedback/Suggestions, if you need help with the software open a support case