Hi Gerry . . . I'm running the latest Sonar Platinum as well, I opened a project from 2013 that had many V-Vocal clips and they open and play as expected, then I opened an older project from 2007, it also works properly, region editor opens the V-Vocal editor window and it all seems to work.
HOWEVER, If I try to create a new V-Vocal clip it does throw an application error message (taskhostw.exe - Application Error) the error references that is a memory related error. It also says to click OK to close the program, but when I click OK . . . the V-Vocal clip is created, and Sonar does not close or restart, and appears to work normally. The new V-Vocal clip appears to work fine. Granted, my system is different than yours (especially you're still 32 bit), so I can't confirm they've actually broken V-Vocal in 2016.08 version . . . but it is breaking down, perhaps suffering from old age, it's just a matter of time.
Also, I should add that I never noticed a problem since I don't use V-Vocal anymore, and haven't for a few years, since I've been using Melodyne, so not sure if it's just the most recent Sonar version that does this or not ?