Yes, i have the same problem since begin, now i have a new problem "Download Error" i deinstalled ASC and installed the newest version, but the same problem. (Windows 7, 64bit).
I deactivated Antivirus and closed all other programs, but this dont work.
Support told me to reinstall ASC...... :-) Hahaha, i wrote them before i tryed this with no success..... Because of this i dont buy Arturia products and wait. There are other good VSTs out. :-)