Project crashes 32-bit Sonar but not 64-bit

I posted this a few hours ago and my post seems to be gone.  If it's still there, let me know so I can delete this...
 
Yesterday a friend listened to a song I started and then quit working on in July. He made some suggestions that I thought were good, so I decided I’d put some more work into it.  When I loaded it in 32-bit Sonar (because I used MusicLab’s Slicy Drummer and Fill-in Drummer for the drum track), it crashed Sonar.  I’ve been on a crazy trial and error mission for the past 24 hours to figure out what’s going on.  Here are some facts:
 

1. At first (about 15 times or so), I could load it with no problem in 64-bit Sonar – but with the MusicLab MIDI plugins non-functional, of course.  Since then, I’ve been able to load the last July track occasionally in 64-bit Sonar and once in 32-bit, though I’ve tried hundreds of times.  I have restored it from online backup (late July backup date) multiple times.
2. Besides crashing Sonar, I have had three BSODs while working on this.
3. I have also had Sonar tell me three times while working with the project that I have no physical sound device matching any installed drivers on my computer, though only Sonar failed to find the sound card (M-Audio Delta Audiophile), while WMP and FL Studio had no problem.  I tried re-installing the drivers, but the fix turned out to be switching Sonar to WMD and then back to ASIO.  In fact, a saved version from that fix actually loaded once in 32-bit Sonar, even though it contained NI Replika (see below).
4. By loading the project in safe mode, I have pretty much isolated the issue to a single audio track with NI’s Replika as FX on the track.  I created and saved a version from the safe mode load where I deleted the audio track, and also one where I deleted it and then re-imported it.  As long as I don’t add Replika to the re-imported track, all is fine.  Also, if I load a re-created, saved version of the project that doesn’t have Replika, I can usually, but not always, then add Replika to the track without crashing 64-bit Sonar.  But trying to similarly add Replika in 32-bit Sonar to this particular track ALWAYS crashes it.
5. If I try in 32-bit Sonar to load a version where I successfully added Replika in 64-bit Sonar and saved it, it crashes 32-bit Sonar. Even though the project is not re-saved, since Sonar has crashed without the opportunity to save, I cannot open the project again in either 32-bit or 64-bit Sonar without crashing.  Any version that worked in 64-bit Sonar but then crashed in either 64-bit or 32-bit Sonar will no longer open in 64-bit Sonar even though it has not been re-saved upon crashing.
6. I CAN use Replika on other tracks in 32-bit Sonar, so Replika is “working,” Nevertheless, I have tried uninstalling and reinstalling Replika, but that made no difference.
7. Looking at Windows Application and System log in event viewer, I often see a C0000005 error.  Faulting modules are always SONARPLT.EXE and sometime also TTSRES.DLL.
8. I have unplugged USB devices, etc. One time I got it to run in 32-bit after unplugging the cable from my GAIA SH-01 (which happens to be the synth that the audio for the “bad track” comes form), but closing and then trying to re-open crashed it again.
9. I have looked at new software that’s been added to my system since July.  I upgraded Acronis from 2016 to 2018 yesterday before starting on all of this, so I uninstalled Acronis and re-installed 2016.  No help.
10. I tried rolling back SPLAT to July.  No help.

 
What am I missing???

I have thought many times that maybe I need to get with the program and wean myself off of 32-bit Sonar.  But even if I did, I would leave it installed so that I could go back to old projects that I never finished.  More than 90% of my projects use Musiclab MIDI plugins and I'd at least want them to open with the plugins intact.  I have had really no problems until now using 32-bit and going back and forth between 32-bit and 64-bit.  So I'm  still looking for a suggestion for how to fix this.

Does anyone know if there is a way to exclude 32 bit plugins from showing up in 64 bit Platinum? I have tried to remove their folders in the plugin manager but, they will not go away.

smoddelm: Yes. Re scanned, closed and re opened.

Thanks, scook. I'll try that.