Thought I'd give an update to this thread. I'm presently working with a Corel support person to resolve the crashing issue. Here's what's been tried so far and the results:
Unplugged all peripherals and launched Toast 19. Still crashes.
Completely uninstalled Toast 18 and Toast 19 plus any other Corel/Roxio files as per https://support.corel.com/hc/en-us/articles/360048459774-Toast-18-Uninstall-Procedure-Quick-version . I then reinstalled Toast 19. This also did not work; Toast continues to crash shortly after launch.
Again, I completely uninstalled Toast 19 and then reinstalled it from an Administrator account. This time, when I launched it, it ran just fine. I didn't actually burn any discs but I was able to go through the menu systems w/o making it crash. So, the program CAN run on my machine; it's just got a conflict somewhere with something else.
If you're desperate to use it, you can uninstall/reinstall as Administrator and go from there but that's pretty much a last resort for me as getting access to the files would be a major PITA. I'd rather go back to Toast 18. However, I'll stick with a glass-half-full attitude and hope that we can get things running normally soon.
However, I just received this final word from Corel Support:
"Toast 19 will only work in a account which has Admin rights."