uninstall.dat missing

Not able to uninstall netvault on CentOS 7. 

Error: There has been an error.
The uninstall.dat file cannot be found and is required to uninstall the
application, aborting
Uninstallation did not complete successfully


Also not able to install over the existing installation.

Error: There has been an error.
A newer or same version of this product is already installed.
Press [Enter] to continue:

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