On my main DAW, when I right-click to add a PC module, most of the little pictures which illustrate the PC modules are blank.  On my laptop, they are all present.  The PC has been upgraded from X1, X2, X3 to Plat.  The laptop was installed fresh.
 
How do I get the PC icons working on my DAW?

I see the same thing. On my main DAW, about half of the PC icons appear. It had X1, X2, X3 and now SPlat.
The laptop has a new install of SPlat and they all appear.
Possibly it may have something to do  with screen resolution.

I've seen this mentioned before...I'm not sure, but I think doing a plug-in reset.re-scan solved the problem. Maybe someone can chime in with a definitive answer.

Hmmm.... Rescan VSTs seemed to fix this. I thought I already did this.
Seems I need to do this a few times, I'm getting different results each time (like PC76 compressor missing, etc.).
 
Strange.
 
EDIT: Oops... those 'missing' PC effects were already in the channel strip. Duh...
 
 

I think when this happened to me just after the update that it was just a matter of closing Sonar and reopening it. I think what happened really was that the VST scanner just needed to get to these files on the scan process.