(repeating response to Glenn Stanton on Dreamtonics forum for the benefit of the CW community)
Thank you for the tip! I did in fact notice a 2005 C++ redistributable a few weeks ago during a Waves Central update. Well, I thought before I track down the respective dependencies of CW Sonar and Synth V, I might as well simply do an uninstall/re-install of Sonar to see if that might have sufficient restorative benefits. And it did! SV Pro 2 2.1.2. works fine now.