Hello, good evening and welcome...
Cakewalk do not make Blueverb plugins, Nomad does. Cakewalk merely supply the plugins.
Cakewalk included Blueverb plugin with X3 but did you buy it seperately with 8.53?
Could you be specific about you mean by 'would not install'. What error messages are you getting? What package and version are installing and from where? 32 bit, 64 bit?
Anyway I suggest restoring the Blueverb DLL (plugin) to a completely different folder from Ghost backup and then adding this folder to Sonar 8.53s VST file path.
Well done for making a backup BTW that's why we do them. It's not unusual to get the odd glitch.
As far as visibility issues are concerned please search the forums there's a thread about this somewhere I suggest you piggyback on.