@Fabio Biolcati said:
Thank you for your reply, Fabio; downloading and installing libraries is such a time consuming process.
May I safely move them in my new Users/Documents folder?
The other bad new is that Directory Manager, Library Installer and VI (Standalone — haven't tried in host yet) refuse to run; they prompt up with an error message as if I'm running the wrong OS X version (actually is 10.11.6 - 15G18013). Download Manager works seamlessly.
Well, I'm keeping my libraries on external drives and often moving and re-arranging them between new HD and SSD (to manage space and performance) and between my Mac and PC DAWs: then I can confirm that it's totally effective and safe to move the library content folders, and the only action requested is to run the Directory Manager to have the VI and VE automatically accessing to them in the new location.
About your custom presets, to be honest I can't help: they are saved in some default folder (but I don't know in Mac and Windows, and I don't care because I save them in other folders) but you may also save wherever you like, then I've no idea where you had them. If you need to recover them of course just search via keyword file/folder names you may remember.
About your other issue I can't comment, but I suppose you reinstalled at least the software: doing it is pretty fast, then I recommend you remove/uninstall all the old programs and make a fresh installation of all the last versions, then use the Directory Manager form the last fresh installation. Usually it fixed problems in my experience.
Last but not least... Good Luck, that's life (...of us, poor digital guys...)