Cubase hangs on start

Software: Windows 7, Cubase 7.5.30
Hardware: I have an internal soundcard (Realtek) and an external USB card (Edirol UA-25 ex).

  1. Start Cubase.
  2. Go to devices and choose the USB card.
  3. Close Cubase.
  4. Unplug USB.
  5. Start Cubase. It hangs while it is showing “VST 2.x Plug-In Manager” in the splash screen.

However if I choose the internal soundcard before closing Cubase and then I restart without the USB card, everything runs OK.

If it were due to a third party plugin I would appreciate a log file that would give me a hint… Is there a log file where I can look at?

Thanks much for taking a look at it!