Great... Just keep watching the event viewer.
Ta

I am pretty sure I now live in a different universe.  This morning I got up ready to video conference with Slate (they sent an invitation to do this) and give Joey Adams a call in CW tech support.  When I told the Slate folks that the only way everything worked was by totally removing their plugs, they felt that they could fix whatever was causing the issue.  This despite a formal notice on their website that Sonar is unsupported.  They were so upbeat that I went back into my Slate account and.... whoa? All of my Slate builds were probably at least two years old. I totally eliminated anything on my computer that was from Slate. I downloaded all of their newest builds.... but only the 64 bit VST3 versions. I reinstalled everything and updated my PACE. 
Next, since I am doing this updating, I updated everything CW, including the new Gloucester build. The only thing I did not reinstall is the Softube plugs. I really don't use them.
I then made sure all dead dll and registry errors were gone.
 
I rebooted and fired up SPLAT.  Everything works. Projects that immediately crashed only two days ago, now run fine. All of the Slate stuff is working like a champ. 
 
I've been going through projects for two hours. I can not get sonar to crash.  At this point, I don't think I will need to do anything with either Slate or CW support.   I keep waiting for it to crash...  so far, so good.
Thank you to each and every one of you who contributed. 
steve

That's awesome Steve!

Glad to hear that it was an easy fix And now, music...

It was the Softtube plugin for me causing the crash.  I just uninstalled it and everything scanned fine.

stevee9c6
I can not open any projects previously done. Every single one crashes.
I have done pretty much everything suggested here. 
I have submitted 12  numbered events to cake via the auto reporting feature (These are visible in account as awaiting review)
This is what I see for all 12 reports.

CWBRN-34360 Report Details

ProductSONAR PlatinumVersion21.5.00.32 x64StatusAwaiting ReviewSummaryNew Report from Crash ReporterRepro StepsTried to open this project that I have been working on for over a week.Expected Results Actual Results Audio Device- - Select Audio Device - - - UnknownOS- - Select OS - -ReproducibilityReproducibleFiled7/25/2015Last update7/25/2015

Additional Files/Notes ?

 
 Additionally, I submitted a separate support ticket.
 
I have not been contacted by anyone from CW via email or my contact information provided. 
Their support hours are exactly when I am unable to be at my machine or talk to them.
I have this Friday off and plan to phone them.
 
I have a new project started that seems to be ok.   I'm not complaining, venting or ranting. I am simply matter of fact stating my current situation. I am hopeful it will get better after talking with them.

Was your system date really set to the year 2015? I noticed the same thing in the SystemTime info in the previous info you posted. I can imagine that might cause some strange issues with license validation, among other things.