Halion sonic SE prob

My Halion sonic SE did behave in very strange way, so i decided to uninstall and reinstall it.
Now, i cant seem to find the correct disc in my retail pack…i have the cubase 6 disc, some demo discs and a halion tryout version on disc… is the halion sonic on the C6 installation disc?
Can i reinstall only the vst?

HALion Sonic SE is a part of Cubase. The installer should give you options for which “components” to install.