Yeah, there is a manual scan option but by default Cakewalk is setup to automatically scan when changes in the scan path are detected.
I don’t recall if the VCV installers read HKEY_LOCAL_MACHINE\SOFTWARE\VST to set the default scan path or hard code a default.
Consider modifying this registry entry and carefully review installers for the plug-in install path they use.
If you cannot find the dlls, re-run the VCV installer, the option to change the path is on the third screen. This will show you were the dlls were installed.
Use Preferences > File > VST Settings in Cakewalk to add a path for scanning or as mentioned above move the files.