1) Check where are the backups stored
2) Stop M&D Service
3) Using this example, copy the file
C:\M&D_Backup\MailAndDeploy_RepositoryBackup_20220720.bak
to
C:\Mail & Deploy folder\Data\Repository.db
Note: if the option Compress To ZIP Files is checked, first unzip the file.
4) Start M&D Service