I would suggest backing up your copy of the VST 2 SDK.
http://www.kvraudio.com/news/steinberg-software-development-kit-sdk-for-vst-2-no-longer-available-24335
I would suggest backing up your copy of the VST 2 SDK.
http://www.kvraudio.com/news/steinberg-software-development-kit-sdk-for-vst-2-no-longer-available-24335
The latest version of the VST3SDK I downloaded contains the VST2 code within... I don't think there's much to backup.