The x64 version of my DAW (Sonar) doesn't recognize/bridge x86 plugins very well. Saves me a headache to just open older stuff with the x86 install.
I have quite a lot of projects (or earlier versions of them) with older/discontinued plugins than only come as x86, but have been already tweaked quite extensively in the projects and so still sound better than any replacement/newer plugin I throw at it (as examples apQualizr, which is a 'surgical' EQ, some LePou stuff, or Onqel's X30 free plugin, which, alas, sounds better than anything I've tried with the X50 (tbh though, I haven't been recording much at all the past few months; me buying your plugin is a way to find motivation again, haha)
Cheers
*Ah, just realized some new version of that EQ plugin finally got released 2 months ago! Thanks for the question, otherwise I would have missed it