Hi,
you can find the DSN that you use during the installation in the registry. You should look into HKEY_LOCAL_MACHINE\SOFTWARE\VMware, Inc.\VMware vCenter Site Recovery Manager, InstallDsn contains the DSN used during the install. After that open the ODBC Data Source Administrator(System DSN) and look for the DSN that is from the InstallDsn registry key.
Hope this helps,
Daniel G.