Manual Uninstall
Uninstall can be done from the command line as follows:
msiexec /x DSEngineInstall.msi
or
msiexec /quiet /x DSEngineInstall.msi
Instead of passing the name of the MSI file to msiexec, you can alternately substitute the Product Code, which is {F80D0E61-23AF-4934-A40B-190F2A1C52CE} for both 32-bit and 64-bit Engines. For example:
msiexec /x {F80D0E61-23AF-4934-A40B-190F2A1C52CE}