You can reinstall the version of SnapManager that you are currently using to repair missing or corrupt files, shortcuts, and registry entries.
Unless it is specified for a particular upgrade path or for a particular troubleshooting situation, you do not need to uninstall SnapManager before reinstalling it or upgrading to a newer version.
You do not need to stop Exchange services before, or during the SnapManager software reinstallation process.
If you have uninstalled SnapManager, then the reinstallation procedure is identical to a new installation of the software.
If you used SnapManager to manage your Exchange databases before you uninstalled the SnapManager application, then ensure that you configure SnapManager with the same SnapInfo directory locations that SnapManager used before the reinstallation. If you configure SnapManager with different SnapInfo directory locations than used previously, then SnapManager no longer has records of any backups made before the reinstallation of SnapManager occurred.