[cwsand]

I don't know if you could move them and relink them, but you might be able to uninstall them and change the directory they're installed to when you reinstall them.

Looking at my Avid account, I have Avid Virtual Instruments 10.0 and Air Creative Collection Instruments 11.3.1 installers listed under Legacy - so I think those for are the old 32-bit applications. The latest installer is named First Air Instruments Bundle 18.10, and I have a separate Xpand! 2018.10 installer. You should check your own Avid account, but I think you'd be safe uninstalling the old ones unless you're currently using Pro Tools 10 or 11 (you didn't state what operating system and Pro Tools version you're currently using).