I just downloaded the latest version of Neon and I get a failure to initialize. Rhino just did a service release canidate update as well just before I tried to install Neon
Version 5 SR4 (5.4.30524.11065, 24/05/2013)
I got it fixed. For some reason there were 2 instances of Rhino 5 installed the 32 and 64bit version, I was trying to load it onto the 32bit. I am not sure where the 32bit came from, I am pretty sure I only installed the 64bit ???? This is a brand new machine, I never had any of the beta versions on here.
Both get installed for compatibility with V4 plug-ins.
Prova a far partire di nuovo l'installazione e vai su repair, di solito funziona :)
Altrimenti aspetta pareri più autorevoli ;)