Nuendo 7.1.30 Crashes

So here I go…
No problem loading a current/recent mix.
BUT, I have removed my powercore 32bit VSS3 reverb and installed the VSS3 Native 64 bit, and now all of my old mixes (seeking that Powercore VSS3) crash Nuendo. Deleting the preferences does not help. Any advice appreciated.
BTW, I see that Nuendo 8 will be only 64 bit plugins - probably long overdue!

Thank you in advance for folks in the community which care to assist in replying.
Be well!

Peter

7.1.35?

Where did you get that from, or is it a typo?

My apologies for the typo!